Can a bad throttle position sensor cause idle surging?

Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. 3) Check Engine Light

What causes the idle speed to go up or down?

The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate. If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. 2. Check Engine Light comes on

What causes idle surges on a car ECM?

What happens when the idle control valve fails?

When the idle control valve fails it can cause all sorts of issues with the vehicle, and in some cases may even render it undrivable. Usually a bad or failing idle control valve will produce a few symptoms that can alert the driver of a potential issue. 1. Irregular idle speed

What kind of engine does a 1995 Camaro have?

5) in 1995 the model with 3-door hatchback coupe body and V-6 3350 cm3 / 204.4 cui engine size, 119 kW / 162 PS / 160 hp (SAE net) of power, 271 Nm / 200 lb-ft of torque, 5-speed manual powertrain offered since mid-year 1994 for North America .

What are the specs of a 1994 Camaro?

Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Chevrolet Camaro 3.4L V-6 (man.

What causes the Check Engine light to turn off at idle?

At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. The check engine light will randomly turn on and off even if the car is running smoothly without any jerks and stalling.

What is the diagnostic code for engine stall?

Diagnostic trouble codes P0120, P0121, P0122, P0123, and P0124 are what will commonly appear. The engine can stall for no reason and without any warning. This happens when the TPS gives incorrect information to the ECM. The engine can stall at high speed, at low speed, or even at idle.

Is the drivig engine smooth at low idle?

So smooth you could balance a coin on the engine even at low idle revs of around 650 rpm. In fact drivig with the TPS disconnected is quite acceptable, except that automatic gear change down does not happen (as expected). Have had the car for approx 13 years and has been a great, reliable family car.

Which is worse rough idle or perfect idle?

Very rough idle with a repetitive cycle that is smooth for a couple of seconds then misses badly, occasionally stalling. Worse problem is bad hesitation when accelerating after throttle at idle position, sometimes stalling. Worst after stationary idle, but also after moving at low to medium speed with closed throttle and then accelerating.

Why does my S10 jerk at steady speed / RPM?

I have a feeling my problems are caused by my exhaust (burning a little oil, muffler is 5 years/60,000 miles old, God knows how plugged my cat is). Basically, the problem could be caused by anything. I’ll get started on my list in the next couple weeks and keep checking in for more ideas.

What causes engine revs to drop when idle?

3) Once at normal operating temperature, the engine misses badly while idling. It idles smoothly for a second or two, then misses, which causes the revs to drop suddenly, and then the control system seems to increase the idle speed to counteract the drop in revs for a second, and then the cyle repeats.

How to reset the baseline idle speed in a GM TBI?

Turn the screw to adjust the idle speed to 650 RPM +/- 50 RPM. Turn off the engine and disconnect the negative battery terminal from the battery using a wrench. Reconnect the IAC valve. Reinstall the air cleaner and remove the paper clip from the ALDL connector. Reconnect the battery terminal after 5 minutes and test drive the vehicle.

How do you change the idle speed on a T-30?

Insert a T-30 size Torx driver into the Idle adjustment screw that is located behind the plug removed earlier. Turn the screw to adjust the idle speed to 650 RPM +/- 50 RPM. Turn off the engine and disconnect the negative battery terminal from the battery using a wrench. Reconnect the IAC valve.

How long does it take for GM throttle body to relearn?

If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle. It will eventually learn it on its own, but it may take over a week of driving, during which time you will experience high and low idle speeds and possibly rough idle. 1) Start the engine and let it idle in park for 3 minutes.

Why does my car stall at low rpm?

The will likely force your computer to stall the engine and only allow it to run at low RPMs, which means the car will only move at slow speeds. This is a safety feature enforced by the computer so that your engine doesn’t get too damaged.

How to do throttle body re-Learn Chevy Malibu?

1) Start the engine and let it idle in park for 3 minutes. During that period the idle may be higher idle than normal. 2) After 3 minutes, turn the engine off and leave it off for 60- seconds. 3) Start the engine again and let it idle in park for 3 minutes one more time. During these run periods you may see a check engine light.

What causes the engine to surge at low speeds?

Idle Speed Control Issues On some models, a faulty or fouled idle speed control (ISC) motor [or idle air control (IAC) motor] may cause the engine to surge at idle or at low speeds. A common problem is carbon buildup. It prevents air to bypass the throttle plate as commanded by the car’s computer.

What can I do to stop engine surge?

A simple task like replacing an old air filter can stop engine surging. Many maintenance tasks are simple procedures in many vehicle models. And you can do many of these tasks yourself at home using common tools. Consult your car repair manual.

Why does the engine surging stop at idle?

If I put a load on the engine by turning on the airconditioning compressor, the surging will often stop. This is an intermittent problem but seems to occur at least 50% of the time and seems to be worse after the engine has warmed up. Thank you for any input. My car has 225000 miles. My car has a manual transmission.

What causes engine to stall at high idle?

The first issue is the high idle. The question is was that caused by a mechanical issue or an electronic issue. The 3 codes come from a higher idle condition that isn’t controlled. If the TPS sensor sees closed throttle, but a high idle with matching MAF/Map signals, it flags the codes.

What does it mean when your car throttles up while driving?

In these cases, the TPS isn’t providing the right input, the onboard computer cannot direct the engine to work properly. When the car accelerates while driving, it usually means the butterfly valve inside the throttle has closed up and pops open suddenly when the driver presses on the accelerator.

Why does my Chevy tracker have a rough idle?

What are common reasons my Chevrolet Tracker has a rough idle? While there are a variety of reasons your Chevrolet Tracker has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.

Why does my 2002 Chev suburban vibrate when idle?

My 2002 Chev Suburban has a slight tremor or vibration when it is idle or at a red light. I have replaced the plugs, and added gas treatment, but it still vibrates. It noticed it right after a fillup with 87 octane gas, and wonder if it is a gasoline issue.It has 52k miles on it, and otherwise runs great.

What does it mean when your car has blue smoke coming from the tailpipe?

Blue-gray or gray-white smoke. Blue-gray or gray-white smoke usually means the engine is burning oil. If you have a turbocharged engine, a faulty turbo seal could be causing this, but if you have a more common engine, it’s likely one or more of the following problems:

Why is my Chevy Tahoe rough idle and stalling?

Typically, the temps have to be 40 degrees or below for this to occur. It never happens during the warm spring, summer and fall months. I replaced the fuel filter last fall and was told at that time by the local dealer that my burb has a flex-fuel motor and that this was a bit rare for this year model.

Why does my car idle at low rpm?

Incorrectly Installed or Damaged Spark Plugs (in petrol engines): Spark plugs are responsible for creating the spark that allows the vehicle to burn fuel. If spark plugs are improperly installed or malfunctioning, the idle speed can be affected. The vehicle’s engine may vibrate or there may be slipping or straining sounds coming from the engine.

Why does my Chevy Tahoe shake when I ID?

If an oxygen sensor goes bad, it can make your Tahoe run too lean (or rich). A super lean running engine will often shake when idling. The mixture would be wrong at all RPM, but as the engine speed increases the shaking decreases. 7. Fuel Injectors

Can a bad spark plug cause a Chevy Tahoe to idle?

Spark Plug Wires – While not every model and engine combination of vehicles today comes with spark plug wires (a lot are now coil on plug), if your Tahoe happens to have them, they can go bad and cause a rough idle. Here’s a great video on how to diagnose bad plug wires with a multimeter.

Why does my Chevy Tahoe shake when I idle?

If a good spark is not achieved, your Tahoe will shake as it misfires and tries to stay running. Here are the main components of the ignition system, as well as what would cause them to make your Tahoe shake when idling. Fouled plugs can cause a misfire, which in turn causes an idle shake.

How is the throttle connected to the accelerator?

In the old days, there used to be a cable that was connected from the throttle to the accelerator. But now in the technological age, the car’s computer controls when the throttle opens and closes by the feedback it gets about the acceleration of the vehicle.

Why does my Traxx die at full throttle?

Click to expand… mine also bogs out and dies at full throttle but that’s ONLY if you give it full throttle. Also I’m not letting it warm up a little before giving it full gas could that be the problem?

What are the symptoms of a bad throttle / accelerator pedal?

Symptoms of a Bad or Failing Throttle/Accelerator Pedal Position Sensor. $79.99 – $89.99. Average rating from 4,829 customers who received a Check Engine Light is on Inspection. The days of having to constantly adjust the throttle cable due to a loose nut on the carburetor are long gone.

How to reset throttle body calibration [ step by step guide ]?

Make sure that the accelerator pedal is fully released. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds.

What happens when the throttle body goes bad?

Nowadays there is an electric system that’s far more efficient than the old ways but it can still have issues. When a TPS goes bad, then the car’s throttle body won’t function properly. It could either stay shut or it won’t close properly which is a severe issue. If it stays shut then your engine is not going receive air and it won’t start.

Can a bad throttle position sensor cause spontaneous acceleration?

Your engine may start up but it will have little to no power and it causes it to shut off. On the other hand, it can also cause your car to have spontaneous accelerations even if you didn’t step on the gas. Unstable Engine Idle: Faulty position sensors can cause sporadic idle conditions due to fluctuating airflow.

What causes a smooth idle on a drivig?

Discovered by accident that disconnecting the TPS causes the idle to be perfectly smooth. So smooth you could balance a coin on the engine even at low idle revs of around 650 rpm. In fact drivig with the TPS disconnected is quite acceptable, except that automatic gear change down does not happen (as expected).

What are the symptoms of a broken MAP sensor?

Hesitation or Stalling. When starting from a stop or trying a passing maneuver, stepping on the gas might not give you any joy, especially if the ECM is giving you a lean mixture based on faulty MAP sensor readings. Check Engine Light .

What’s the idle speed on a Chevy Silverado?

Although mine is a lot different than yours, I can tell you it will idle down to about 500 RPM when warm. However, if it’s been acting sluggish, you may need that checked out (or just spend more money on more HP ). Put in some better fuel (Shell or Mobil premium) and just DRIVE it. Very little extra cost to you and it cleans as you drive.

What should I do if my engine idles at 500 rpm?

Put in some better fuel (Shell or Mobil premium) and just DRIVE it. Very little extra cost to you and it cleans as you drive. Your truck will thank you! Generally speaking these injected computer controlled engines have pretty low ldle speeds.

What should the RPM be on a Chevy Silverado?

Farside, we have the same trucks (roughly). At cold start, mine jumps to 1400-1500. It quickly drops down to 1,000. After it warms up, it is consistent at 500-600. So I think yours is pretty normal. If it is sluggish, I agree with using a Top Tier fuel, and a can of Sea Foam or Amsoil Performance Plus in the next tank.

Why is my Chevy S10 engine stalling out?

This can be caused by the fuel pump or fuel filter. If your Chevy S10’s engine timing is off, it’s going to stall out, misfire, and altogether not run properly. Here are some of the more common causes of an engine timing problem: VVT Problem – Many modern engines are equipped with Variable Valve Timing.

What causes engine knock on a 4.3L Vortec?

Engine knock can be caused by a ton of factors, such as low-grade fuel, bad spark plugs, carbon build-up, etc. Engine knock is terrible for your engines internals and can cause serious damage to the pistons and to the cylinder walls. On the 4.3L vortec, the cause of the engine knock has not necessarily been figured out, still to this day.

Why are the Spider injectors leaking in the L35 engine?

The spider system uses a central pump with 6 tubes connected to it that lead to each of the 4.3L vortec cylinders. In the L35 and LF6 engines, the spider injectors are known to leak at the pressure regulator and at the supply and return lines due to a design fault.

What causes a Cadillac Escalade engine to stall?

If the converter doesn’t unlock, then the engine will stall much like a manual vehicle does when it doesn’t have enough speed to carry a gear. It’ll often throw code P0740. If there is almost no oil left at all, the engine could be on its way to locking up.

What are the symptoms of a bad accelerator pedal sensor?

In this article, you will find the most common symptoms of a bad accelerator pedal position sensor 1. Your car hesitates to move when the gas pedal is pressed 2. The engine doesn’t idle smoothly 3. Your car doesn’t accelerate over a specific limit 4. Your car won’t shift up or jerks upon depressing the pedal 5. You experience low gas mileage

What are symptoms of bad crankshaft position sensor?

Problems with the crankshaft position sensor will often present as problems with engine timing. If you think your sensor has failed, here are some common symptoms of a bad crankshaft sensor that can help you in determining whether or not it has failed. As the engine speeds up, there needs to be adjustments to spark timing and fuel injection.

What are the symptoms of a bad distributor rotor and cap?

Symptoms of a Bad or Failing Distributor Rotor and Cap Common signs include engine misfires, car not starting, the Check Engine Light coming on, and excessive or unusual engine noises. by Valerie Johnston on January 07, 2016 Vehicle Engine Mechanical Inspection Cost

Why did my brakes go out on my Chevy S10?

I have a 2003 chevy s10 pickup. I just lost my brakes the went out. I installed new brake lines and new vacuum hoses to power booster. I bled all brakes and have fluid in lines. When the truck is off and brake is pushed, its very stiff and hard to push down. If I start truck and push brake it’s very easy to push to floor.

Are there two Bleeders on a Chevy S10?

There should be two bleeders on motor. If so, you’ll need someone to help you. Whoever is pumping. Apply pressure to brake pedal like holding at stop light. The other start with bleeder closest to engine. Open bleeder and push brake pedal to the floor and hold until bleeder is tightened.

How to bleed mastercylinder on a Chevy S10?

Ok get someone to help you to bleed mastercylinder. You can do it while still on truck. Just pump up and crack the brake lines loose. Do each one a couple of times and do you have access to a scan tool. You will need to do a power bleed on the abs motor.

When does the idle air control valve change?

When the engine is running but the vehicle is not moving, this means the engine is idling. During this time, the number of revolutions per minute (RPM) inside the engine will change. The idle air control valve is responsible for managing the engine idle speed.

What happens to your car when you idle?

A rough idle will result in intense vibrations forming whenever your vehicle is stopped with the engine running. Since less air will be going into the engine during its idle state, the car will react by shaking profusely.

How to test the throttle position sensor ( GM 3.1L )?

The throttle position sensor on your 3.1L (or 3.4L) GM vehicle has three wires connected to it. Each wire has a specific task to accomplish and with the photos and circuit descriptions below, you’ll test each one with your multimeter.

What does the throttle position sensor ( TPS ) do?

The throttle position sensor (TPS) is part of your vehicle’s fuel management system and helps ensure that the correct mixture of air and fuel is delivered to your engine. The TPS provides the most direct signal to the fuel injection system of what power demands are being made by the engine. The TPS signal is continually measured…

Can a bad throttle position sensor cause a car to shake?

A bad throttle position sensor can cause other issues on your car if left unattended. That’s right! If the sensor is faulty, it will cause your car to shake heavily. Eventually, if this issue is left unattended it will put major stress on your motor and transmission mounts to the point where they will give out and will need replacement.

What happens when your car is in limp mode?

What happens if you leave the mass airflow sensor off?

The reason it starts with it off is the computer sees no mass air signal and replaces it with an internal memory fake signal to use. This will let it start and will run well enough to get to a service repair place. Leave it disconnected for too long without getting it fixed can start to foul spark plugs and will have other different driving issues.

Why does my GMC Envoy die at idle?

Took it to them. When the vacuum line is activated for the engine, such as when the air or heat was on, the truck would die at idle (when in gear only, would not die if in neutral). I had changed the battery and on the Envoys it resets all previously stored air/ fuel, idle, etc info that the computer had previously gathered about the motor.

What happens if you have a bad MAP sensor?

A bad manifold absolute pressure (MAP) sensor can upset fuel delivery and ignition timing. Depending on your vehicle model, your engine might experience one or more of these performance problems: However, these symptoms are not exclusively symptoms of a failed MAP sensor. Sometimes, a bad sensor may trigger the check engine light (CEL).

Can a bad vacuum hose cause a bad MAP sensor?

For example, in many applications a leaking vacuum hose or a bad throttle position sensor (TPS) may cause a trouble code that points to a faulty MAP sensor. Troubleshooting the sensor is the only way to determine whether the sensor or part is actually bad. On some models, you only need to remove a couple of screws to get to the sensor.

How does a MAP sensor work on a car?

What Does a Map Sensor Do? Basically, a MAP sensor reads the amount of air pressure in relation to vacuum inside the intake manifold, either directly or using a vacuum hose. Then, it translates this pressure into a voltage signal that the sensor feeds to the power control module (PCM), your car’s computer.

What does the MAP sensor read at sea level?

When at rest, the MAP sensor reads atmospheric pressure at sea level (29.93 in. Hg). Because atmospheric pressure varies with weather and altitude, the ECM calculates this “zero” point just before the engine starts, fine-tuning spark and fuel injection mapping from that point.

Why is my Chevy 4.3 engine still running?

Checking your vehicle’s fluid levels is always a good idea to maintain the overall longevity of the engine. Once you have ruled out all the basics, you can go back to what the Chevy 4.3 engine is known for: bad idle air control valves and throttle control switches.

How is my 1994 S-10 4.3 running?

Starts fine, even today when it was -15, fuel pressure 52 running, holds after shut down, newer plugs/wires/cap rotor, tested MAP sensor and tests good, tested resistance changes in TPS (with sensor out) and changes were smooth along range, unplugged every sensor I could find individually looking for changes, no luck.

How often does a 94 S-10 4.3 drop rpm?

After you take it out and drive it, it’ll idle fine for a couple minutes, then will drop a couple hundred rpms every 30 seconds or so for just a count, then back to normal. Any ideas? I’m pulling my hair out.

What causes a misfire on a 94 S-10?

Typically if the lower intake gasket leaks vacuum, it only affects one cylinder and causes a noticeable misfire all the time. On your engine, the ECM batch fires the injectors, it can not richen the mixture for individual cylinders.

How to check the power of a S10 Blazer?

An expert that got 5 achievements. An expert whose answer got voted for 100 times. Check your coil output, buy a cheep spark tester. Pull of a spark plug wire and plug in the tester (ground the other end), set it to bridge a gap for 30,000 volts.Have someone start it and make sure the spark will jump the gap on the tester.Danger-Very high voltage!

What makes the engine sputter at 3000 rpm?

The fuel cuts out and starts to sputter at 2000 rpm all the way to 3000 rpm. I have changed plugs, MAP, TPS, IAT, crank sensors, wires, cool pack, cool mod, fuel pressure, fuel pump, crank, timing gears and chain ECM/ECU. Checked grounds, injectors, head gasket. I check compression it is 180 across the board.

What causes high idle and high engine speed?

This valve is prone to sticking. If the plunger is backed out too far, this can affect a vacuum leak, causing a high idle after the engine has warmed to operating temperature. This can also result in a pulsating/fluctuating engine speed. While most repair manuals recommend replacing this valve assembly, it can be removed and cleaned.

What causes a rough idle or a ses?

A Rough Idle or a SES can sometimes be caused by a change in the throttle body position sensor calibration. To correct any accidental changes in throttle body calibration, use these procedures to recalibrate. Note: These procedures are a little tricky to do. You must get the timing just right Use a stop watch to help the precision of your timing.

What happens when the Idle is high on a Harley Davidson?

Strange that there are no historical codes since you did say you saw the check engine light come on. (Could be you went through 50 key cycles with no engine issues) When you get off the interstate & the idle is high,,, if you were to power it off and restart the bike, does the idle calm down or does it resume the high idle.

Why is my 5.3 L missing and rough idle intermittently?

5.3 L Missing and Rough Idle Intermittently I have changed Spark Plugs,Wires ,Coil Packs, and removed Fuel Injectors and soaked overnight. Engine code is a P0304. Misfire Cylinder #4. Most of the time around town is alright. When i put it on highway, it will surge like its cutting off and then pick right back up and be fine. Fuel Presure is 55 psi.

Why does the engine stop working at idle?

This actuator receives information from the electronic control unit (ECU) so it knows at what RPM to keep the engine for a smooth and safe idle. When the actuator malfunctions, the engine gets no signal for idling speed and stops working.

What happens if you have a bad idle control valve?

Since the idle air control valve is supposed to manage the idle speed of the engine, a bad valve will certainly throw that out of whack. It will cause the idle speed to randomly fluctuate to different speeds rather than stay at one constant speed. The idle speed may be too high at one moment and then too low at other moments.

What’s the idle rate on a Chevy Tahoe?

The vehical also seems to idle low 550rpm down to 400 and lower on occasion. I have attempted to locate the idle air valve but it doesn’t seem to have one in the location in the manual (on throttle body by altinator). I can only find what I believe is the Throttle position sensor in that location.

What kind of car stalls at idle speed?

I have a “Late” 2001 Suburban LT 1500 2WD that stalls when you are slowly moving the vehicle. It most commonly occurs when pulling into a parking lot at idle speed. The vehicle runs great at speed and if you hold your foot lightly on the accelerator it will not die.

What causes a car to have a high idle?

If it stays shut then your engine is not going receive air and it won’t start. When the throttle gets stuck in an open position than your vehicle will receive too much air and cause it to have a high or fluctuating idle. What are signs of a bad Throttle Position Sensor?

What’s the minimum idle speed for a 1988 350?

For the car we are using (1988 350 AT), the minimum air or idle speed should be a 400 RPM. I highlighted the needle on the RPM gauge as well as marked what the goal for this vehicle should be at (400 RPM). If the speed is off, there is a torx screw on the side of the throttle body on the driver’s side.

What’s the minimum idle speed for a car?

Start engine. Check the RPM gauge for the proper idle speed setting (minimum air). This information can be obtained from Specifications, Tune Up Specs for any year you select. For the car we are using (1988 350 AT), the minimum air or idle speed should be a 400 RPM.

Why is my car surging at idle speed?

When an engine’s computer can “hunt” or “surge” at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system.

What causes an engine to surge during a tune up?

Step 2 – An engine’s tune up is a regularly scheduled service, when this service is neglected it can cause the engine to surge. Learn more Step 3 – If a fuel pump or regulator is failing is can cause an unsteady volume or pressure for the fuel system causing the engine to surge. Learn more

What are the signs of a bad pedal position sensor?

Common signs of a faulty pedal position sensor include inconsistent engine response, reduced fuel efficiency, and the Check Engine Light coming on. 1. Engine response is inconsistent 2. Engine does not run efficiently 3. Check Engine Light comes on Average rating from 129,472 customers who received a Vehicle Engine Electrical Inspection.

What should I do if my GM TPS is not working?

Though this can happen to any car, many GM owners have reported such a failure. The TPS must be adjusted (rotated) so that it reads idle and full-throttle positions properly, or it may appear to be malfunctioning. Try adjusting the TPS before replacement to save a few dollars.

Can a bad idle control valve cause stalling?

3. Engine stalling The idle control valve, also commonly referred to as the idle air control valve, is an engine management component that is found in one form or another on the majority of road going vehicles.

What are the symptoms of an idle air control valve?

One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate.

How much does it cost to replace a throttle position sensor?

If you need to have your throttle position sensor replaced, the cost will depend on the type of car you have. But the average cost of this replacement job isn’t that expensive. The parts will cost you between $75 and $130 on average. The labor costs will be anywhere between $60 and $90, depending on the hourly rate of the mechanics.

Are there any problems with the Chrysler 200 throttle control?

Chrysler 200 owners have reported 8 problems related to throttle control warning light on (under the vehicle speed control category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Chrysler 200 based on all problems reported for the 200.

What’s the etc light on on a Chrysler 200?

Within the last 2 weeks the ETC (electronic throttle control) light has been coming on intermittently. Sometimes the traction control light comes on when the ETC light comes on and sometimes it’s just the ETC light. The check engine light is not on and there are no stored codes except for 2 in the ABS system.

What was the mileage on my Chrysler 200?

The approximate failure mileage was 94,200. The contact owns a 2013 Chrysler 200. The contact stated that while driving at 30 mph and attempting to stop for a traffic light, the vehicle decelerated as the throttle control warning light illuminated. Minutes later, the vehicle was able to be restarted.

What causes the throttle control light to turn on?

Vehicle would randomly accelerate without warning. Electronic throttle control light would turn on and vehicle would accelerate. Pressing on brakes did not help. Lost control of vehicle multiple times while driving down a state highway, and even on city streets.

How to fix engine idle problems in your car?

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Can a Chrysler Sebring run at low RPMs?

AT idle is seems to be fine but you can hear a small miss every 5-10 seconds or so. If you step on the gas while parked, you will hear the hesitation but it will blow through it and run smooth above 2000 RPM. I also noticed that if you are going up hill or have the air on, the problem is much worse.

What’s the idle speed on a new car?

Couple of notes: Initially, it ran fine till it warmed up, at about 1200 rpm , then back to the terribly rough idle…. feels like it’s missing, too. On several cylinders. Would cycle between 500-800 rpm, kinda hunting and gagging around, at about a 1.5 sec interval. Let it idle for about 15 mins straight, not touching anything.

How long does a warm engine idle for?

With a steady throttle, it fluctuated between 3 and 3.5 for a couple mins, then bogged out and stalled. Next time I started it, it went to 2k intially then started hunting between 1k and 1500, with about a two sec interval. After a couple mins, fluctuated around 750, but not steady.

What should I do if my car Idles rough?

Proper repair is straight forward: Pull the intake hose off and thoroughly clean the throttle body so that there are no dark deposits at all, it should show nothing but smooth silver. In severe cases the idle valve will need to be cleaned too, this is not typical though.

How is the idle speed of an engine controlled?

The valve or motor is controlled by the engine control module, which will adjust the idle speed according to parameters such as engine temperature and electrical system load.

What should the throttle reading be at idle?

Once you’ve identified the wires, you can begin comparing voltage readings. The output reading at idle should be about 5 percent or less of the reference voltage, and more than 90 percent when you turn the throttle to wide open.

What does it mean when your car is idling but not running?

When the engine is running but the vehicle is not moving, this means the engine is idling. During this time, the number of revolutions per minute (RPM) inside the engine will change.

Why does my car Jerk when I press the gas pedal?

Your catalytic converter have the function of regulating the emissions that come out of your car. At times, the rich mixtures of air and fuel flowing through your catalytic converter can clog up. This clogging stuff can lead to a jerking or stuttering motion when you press the gas pedal.

What to do if you have a hard brake pedal?

B) On the last push of the brake pedal, hold moderate pressure on the brake pedal. Don’t push like you are panic stopping, but simply hold pressure like you are sitting at a red light. C) With your foot still on the brake pedal, start the engine and pay attention to what happens to the brake pedal.

When an engine’s computer can “hunt” or “surge” at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system.

Can a failed IAC cause engine stalling at idle?

A problem with the IAC should throw a P0505 code. A failed/problematic IAC can cause engine stalling when off-throttle, and/or excessively high engine rpm, particularly at idle. The IAC, signaled by the ECU, controls the throttle opening at idle.

What causes a single cylinder engine to misfire?

Various single cylinder misfire DTCs may also be present. If the frequency of misfire is high, the powertrain control module (PCM) may place the engine in “limp-in” mode. The misfire condition may be caused by one or more engine exhaust valves that are slow to close due to a buildup of carbon on the valve stem. 1.

Can a bad throttle position sensor cause stalling?

Similarly, if your engine struggles to idle efficiently, it could also be a result of a damaged throttle position sensor. Stalling, surging, or hesitating while idling all can be caused by this unassuming sensor. The best way to determine if these issues are caused by your throttle position sensor is to go to the source.

How can I Reset my throttle position sensor?

Reprogramming or resetting your sensor can sometimes solve these issues. This step can also be necessary when you install a new sensor. The easiest way to reset your throttle position sensor is to unhook the negative cable from your battery for up to five minutes or to remove the fuse for your engine control module.

What should the idle speed be on a corvette?

Remove the idle screw plug on the throttle body assembly and adjust the idle to 450 rpm’s. The car may try to stumble and fall while doing this, but get it as close to 450 as possible. Re-connect the IAC connector and the distributor wire.

Why does my C4 Corvette engine not start?

The distributor outputs rotational frequencies to the ECM (Engine Control Module) as a result of the engine being rotated by the starter. This frequency continues as long as the engine turns (both starting and running) if no frequency output is present the engine will not run.

What does it mean when your engine revs up but your transmission doesn’t?

Here’s what you need to know. If your engine revs up as you press down on the accelerator but your vehicle doesn’t accelerate as per usual or as you would expect, it’s a troublesome sign that can lead to a full-blown transmission failure.

What does it mean when your transmission flaring and slipping?

Flaring and Slipping. Slipping is a bad sign in automatic transmissions. If you experience a flaring or slipping of your transmission, stop. Do as little driving as it takes to get your vehicle to a transmission specialist as possible.

Why does my transmission change at the wrong time?

If, however, you’ve noticed the transmission change its behaviour, and you know that the gear changes are delayed, the cause is a control issue. That is, the computer controlling the transmission is changing gear at the time it feels is correct.

What does it mean when your transmission is not shifting?

Q: transmission not shifting and the rpm’s keep climbing up. the transmission is not shifting properly, replaced both input and output speed sensors, but the rpms seem to be climbing high and the transmission does not seem to be shifting, gets up to speed fine, but the rpms just keep climbing on it… My car has 200000 miles.

Why does my Ford Ranger run at idle?

The IAC Module is used to adjust the engine idle RPM speed. The IAC Module opens or closes an air bypass valve (vaccume line) inside the throttle body. It is used to allow the engine to run at idle without stalling due to lack of air when the throttle body is closed (zero throttle input).

Is there a vibration when sitting at idle?

There’s only one little oddity: the truck now has a very slight vibration when sitting at idle, and it most definitely was not doing that before the rebuild. There is no effect on performance, shifting, or anything…I only notice it because I know it wasn’t there before.

Why does Ford Ranger engine stay at high revs when?

Join Us! I have a 1998 Ford Ranger V-6 and since I’ve had it the engine likes to stay at 2,000 – 2,500 RPM when out taken out of gear while acceleration for a little before dropping down to idle. I thought this might be the idler motor, so I replaced it but it is still doing it and has been since.

When the engine is running but the vehicle is not moving, this means the engine is idling. During this time, the number of revolutions per minute (RPM) inside the engine will change.

Why is my Dodge engine stalling and stalling?

In most cases, a bad throttle position sensor (TPS) fails to signal the engine computer about throttle operation. Other causes may be bad or worn out components in the ignition secondary system, causing the engine to accelerate poorly and even stall.

What causes engine hesitation on a Dodge truck?

The engine hesitation on your Dodge may be created by problems in one or more components. In most cases, a bad throttle position sensor (TPS) fails to signal the engine computer about throttle operation. Other causes may be bad or worn out components in the ignition secondary system, causing the engine to accelerate poorly and even stall.

Why is my Dodge Durango idling at 40 mph?

In the morning when it is cold, the RPMs go higher than normal to shift out of first. Between 35 and 40 mph, it has a slight annoying vibration. After speed is leveled off, or the cruise is set, it has a slight hesitation. It finally made the check engine light come on, but the OBD said no trouble codes present.

What’s the problem with my Dodge Durango 05?

Check the Dodge Durango: Problems & Solutions discussion for any related posts over there (try a Search This Discussion for idle). My wife’s 05 Durango surged forward at a stop sign causing a fender bender even with the brake engaged. The dealership claimed a sticking solenoid and fixed it.

What kind of engine does a Dodge Durango have?

I have a 2000 Dodge Durango with 5.2 liter engine. In the morning when it is cold, the RPMs go higher than normal to shift out of first. Between 35 and 40 mph, it has a slight annoying vibration. After speed is leveled off, or the cruise is set, it has a slight hesitation.

What are the idle and surging problems on a Dodge Dakota?

– Dodge Dakota Forum Subject: fixed idle and surging problems! Hey, if anyone has some crazy idle problems, and maybe has the surging (lockup-clutch disengaging and engaging) while crusing it fixed my 2000 4.7 Auto by replacing the Throttle Position Sensor. It was a $25 part and took 37.82 🙂 seconds to replace. RE: fixed idle and surging problems!

How is TPS used in a fuel injection system?

The TPS provides the most direct signal to the fuel injection system of what power demands are being made by the engine. The TPS signal is continually measured and combined many times per second with other data such as air temperature, engine RPM, air mass flow, and how quickly the throttle position changes.

Why does my car idle at rough idle?

Most likely, the causes of rough engine idle crops from the basic functional components like direct fuel injectors, PCV valve, EGR valve, Oxygen sensors, vacuum leaks, air filter, and spark plugs or wire.

Why is my idle speed control valve not working?

One common problem is a buildup of carbon or fuel varnish deposits in the idle speed control valve. The cure for this condition is to clean the valve, with some aerosol throttle cleaner or engine top cleaner. Disconnect the air intake ductwork from the throttle body.

What are the symptoms of a faulty fuel pump relay?

1 Engine does not start. A common symptom of a faulty fuel pump relay is an engine that just refuses to start, even though the engine may still crank when the 2 Engine stalls. One of the most common symptoms of a failing fuel pump relay is an engine that suddenly stalls. 3 Loss of Power. 4 No noise from the fuel pump.

What causes a car to stall at idle?

The torque converter and torque converter lock up solenoid should be evaluated. Another possibility is an internal hydraulic leak in transmission seals causing pressure to apply both reverse and forward gears at the same time, lock up the transmission and stall the engine.

What causes a motor to not idle well?

Low pressure, (below 100) or uneven compression (15% between highest and lowest) can make a motor not idle well. If your compression checks out ok, check your idle mixture. You may be running lean. Your idle is a bit high, which should have you easily able to idle, unless being leaned out is what is making the idle high.

Why does my engine quit when I put it in gear?

Fuel breaks down and just like you might have found in the fine ports of the Raptor carburetor, it causes lots of issues with how the machine runs. It sounds to me that at least on the surface you have cleaned out the Yamaha’s carburetor well and I will give you the benefit of the doubt for that one, but have you thought about the fuel tank?

What to do about low idle and shakes?

So far I have cleaned the MAF sensor, new air filter, new plugs, wires, cap, rotor, cleaned the EGR, replaced the Ignition control and Ignition control module. I have even run GM top cleaner through it (throttle body) for Carbon build-up and got no carbon or results.

How does idle speed work on a GMC Truck?

Scan it for codes. The control module controls idle speed with an idle air control (IAC) valve. The desired RPM is based on sensor inputs and the actual engine RPM. Four circuits are used in order to control the IAC valve, allowing a precise amount of air into the intake manifold.

Why is the throttle not working on my Harley Davidson?

Verify that the throttle plate moves freely when engine is not running. If it does not, the TCA needs to be replaced. Poor ECM connections seem to be the most likely cause and may be aggravated by the seat pan making contact with the ECM connector. Often, this is due to the installation of an aftermarket seat.

What happens when the throttle gets stuck in an open position?

When the throttle gets stuck in an open position than your vehicle will receive too much air and cause it to have a high or fluctuating idle. What are signs of a bad Throttle Position Sensor? Acceleration issues: A bad TPS may cause all sorts of power issues. Your engine may start up but it will have little to no power and it causes it to shut off.

What causes the throttle control light to go on?

The engine computer is programmed to go into limp mode when the system malfunctions, in an attempt to limit your speed and prevent damage to the engine. It can be caused by a sensor failure, or even by outside electromagnetic interference. Your mechanic can diagnose and fix the problem. Can I drive with the throttle control light on?

Why does my car idle but wont Rev?

Mahalo. If there is an electronic throttle control fault the accelerator pedal may not respond. The problem may be as simple as a brake light switch stuck on. Plug in your diagnostic scan tool and go to work. Could the issue have been as simple as replacing an old dead battery?

How to reset the throttle system in a car?

Reset the Throttle System 1 Switch on the ignition key, don’t start the engine. Then, wait for a minimum of 3 seconds. 2 Now, press the accelerator pedal and do press and release five times amidst 5 seconds. 3 Press the pedal again, and this time hold on pressing for around 20 seconds. At least until the engine light stops the… More

What are the symptoms of low fuel pressure?

Low Fuel Pressure Symptoms & Causes 1 Unresponsive Throttle. All cars require proper fuel delivery to their cylinders in order… 2 Difficulty Starting the Car. Low fuel pressure will also make it hard for you to ignite your car’s… 3 Stalling Engine. If your car’s engine stalls while running, it is a clear sign you are having some…

Can a low oil pressure cause engine to seize up?

Low oil pressure will cause the engine to seize up. When the oil pressure light on, it should be assumed that the engine locking up is imminent. We advise not running the engine until the issue can be properly diagnosed. There are many things that can cause low oil pressure. Below, we’ll review the most common causes:

What happens if your Chevy Silverado has low oil pressure?

May 27, 2019 by Jason One of the most serious issues that can happen to your Chevy Silverado ‘s engine is if it ends up with low oil pressure. Low oil pressure will cause the engine to seize up. When the oil pressure light on, it should be assumed that the engine locking up is imminent.

What should the oil pressure be at idle?

Manual says the pressure should be 40 psi at idol, but the gauge is inaccurate. You can test it by T-tapping a pressure gauge in line with your oil pressure sending unit, and see if you are actually running the correct pressures. Question 1, how often do you change your oil?

What are the symptoms of a rough idle engine?

It is possible for you to test the EGR valve at home, using a hand held vacuum pump. Other symptoms: An EGR stuck open may include a rough idle, rough performance at low engine speeds, stalling at idle, increase in fuel consumption, fuel odors, and possibly a check engine light on. 4. MAF Sensor

What should the rate of revolutions be on an idle engine?

When you start your engine, and just let it run without pressing on the accelerator or putting it into gear, that is idling. A properly idling engine should be able to maintain a steady but low rate of revolutions, somewhere in the vicinity of 1,000 RPM. Your tachometer needle should be steady and not jumping around.

What causes a Dodge Dakota to stall and die?

2000 318cid 4X4 158k miles. Not idling. Also when foot is removed form accelerator when in gear (or not) truck stalls. Accelerates smooth and strong. This does not occur all the time.

Do you need to clean the throttle body?

Don’t remove the throttle body to clean it; you don’t need to. Cleaning your throttle body likely won’t do anything to solve an idle problem. It might make you feel better, but it might do little to solve an idle problem. If you have a DBW system, I would recommend leaving it alone, as you could cause more problems than you solve with a cleaning.

How to clean the idle air control valve and throttle?

Please try again later. This is a brief demonstration of how I dismantled and cleaned the throttle body and idle air control valve in a 5.9L 1998 Dodge Ram. This is an amateur effort, published for free but with no guarantees of safety or accuracy. Whenever you research a problem in your car, be sure to obtain information from multiple sources.

Can a dBW throttle plate be cleaned manually?

If you have a DBW throttle body, DO NOT MOVE THE THROTTLE PLATE MANUALLY TO CLEAN IT, especially with the key in the ON position. This will confuse the computer and it will have to be reset in order for the engine to start and run again.

Is the General Motors Rochester throttle body OEM?

The General Motors Rochester Throttle Body (TBI) is OEM original equipment. Each TBI comes complete with injectors, TPS, air control valve, and throttle body bushings. Every TBI will be Flow Bench tested, calibrated, and idle adjusted making it ready for easy installation. Each TBI has a complete one year warranty.

How to order throttle body injection stock number?

Click on “View” and be taken to our picture identification page for the stock number you selected. On this ID page you will be able to visually verify that you have selected the correct TBI for your application and then place your order.

How long does throttle body injection warranty last?

Every TBI will be Flow Bench tested, calibrated, and idle adjusted making it ready for easy installation. Each TBI has a complete one year warranty. T8-141. T8-163. T8-145.

What are the symptoms of a bad air flow sensor?

You may experience: 1 Engine hesitation and/or surging 2 Hard engine seizures 3 Hard starting 4 Check Engine Light

How to test the throttle position sensor ( 2000 )?

To check that the TPS is getting power, go to: TEST 2: Verifying Throttle Position Sensor Has Power. CASE 3: The multimeter DID NOT register any voltage. This test result doesn’t condemn the TP sensor as bad just yet. Why? Because…

How to fix EVAP leak on Dodge talk?

I read this thread http://www.dodgetalk.com/forums/showthread.php?t=330175 and finally got another idea this week. Tonight I got a little time and set my air tank regulator on about 10 psi. I wrapped a rag around a quick release blow gun and tied the handle open.

Why does my Ford Escape make a rattling noise?

My new 2017 Ford Escape, only one month old with 500 miles on it has a rattling noise which sounds like it’s coming from the passenger side door or maybe the passenger side dashboard. It’s driving me crazy. It happens while I drive, which seems to be at any speed.

Why does my 2017 Honda Accord make a rattling noise from back?

My 2017 making rattling noises from back i thought at came from the trunk where the spare tire is because the styrofoam is very loose around there stuck a lots of foam around it still making the noise. Took too dealer didn’t find the problem. The noise is only intermittent

Why is idle speed not coming back up?

If the ISC system is working correctly, the PCM should adjust idle speed to keep the engine from lugging down when the A/C compressor engages. If idle speed drops down and does not come back up, the ISC system is not responding the way it should.

Is there a way to reset the throttle body?

This method is almost foolproof as long as all ECU control parameters are within their normal ranges. Resetting The Throttle Body Calibration (this step is conditional) A Rough Idle or a SES can sometimes be caused by a change in the throttle body position sensor calibration.

What are the signs of a failing TPS?

2. Engine won’t idle smoothly, idles too slowly, or stalls. If you start to experience engine misfires, stalling, or rough idling when the car is stopped, it can also be a warning sign of a failing TPS.

What happens when the throttle position sensor fails?

The throttle position sensor can fail in several ways, all of which result in poor fuel economy at best, and performance limitations that may create safety hazard for you and other motorists at worst. This sensor can fail gradually, or all at once. In most cases, the Check Engine Light is illuminated if a TPS failure is detected.

How is the TPS signal used in the engine?

The TPS signal is continually measured and combined many times per second with other data such as air temperature, engine RPM, air mass flow, and how quickly the throttle position changes. The collected data determines precisely how much fuel to inject into the engine at any given moment.

When does the surging motor of a Dodge truck go away?

Annoying part is a can drive the truck one day without a glitch, next day it’s surging alot I also have this problem with my 2001, with a 5 speed. It occurs when trying to maintain low speeds in 3rd, 4th and 5th gears, anywhere below 1300 RPM. The surging goes away when I accelerate harder.

What causes an engine surge during fuel injection?

In combination with the camshaft position sensor (CMP), the CKP signals are used by the ECU to manage fuel injection and spark delivery. A faulty CKP (or CKP circuit) can easily cause an intermittent misfire, which naturally results in what the driver may perceive as a surging effect.

What does it mean when your motor surges while driving?

The motor surges on and off while I am driving. Here’s the specifics: – The surges last for just a split second, but as soon as the RPMs drop back to normal, another surge will kick in so the tach is bouncing up and down. Are these symptoms indicative of any commonly known problems?

What are the symptoms of a bad transmission speed sensor?

Symptoms of a Bad or Failing Transmission Speed Sensor. 1 1. Harsh or Improper Shifting. Without a valid speed signal from these sensors, the PCM will not be able to correctly control the shifting of gears 2 2. Cruise Control Does Not Work. 3 3. Check Engine Light Comes On.

Why is my engine speed sensor not working?

Enter your ride HERE to be a part of this month’s Ride of the Month Challenge! I tired searching for this problem but 2 hrs later still no answer. I have changed the Engine Speed sensor on the front of the motor 4 times. None of them work for more than a day or 2 if I am lucky. No RPM, no charging and no OD.

What is the throttle position sensor on a Dodge Dakota?

NOTE: The throttle position sensor (TPS) wiring diagrams and info in this page apply only to 1996, 1997, 1998 Dodge Ram pickups, vans, and Dakota with a 3.9L, 5.2L or 5.9L gasoline engine (that use the 3 connector PCM).

What causes a Dodge 24 valve to not start?

NO START: 1. Low or no supply pressure. Buy 24 Valve Fuel Supply Systems 2. No fuel – sending unit in tank defective. 3. If the supply pump recently failed, it could damage the injection pump and cause a no start. 4. Check for DTC, follow Powertrain Diagnostic Procedures Manual. 5.

What should fuel supply pump pressure be on Dodge 24?

FUEL SUPPLY PUMP PRESSURE: The supply pump is critical for the longevity of the VP44 injection pump. The supply pump should maintain at least 4psi at the inlet to the injection pump on a W.O.T. test drive. Failure to maintain a pressurized flow of un-aerated fuel will cause injection pump damage.

Why does my Dodge Ram idle and stall?

Finally found there is a sensor in the gas tank that reads when fuel level is low and shuts truck off to prevent damage etc. The sensor isn’t needed so after he removed it it no longer has those problems. My dodge iddles rough and has a code that says running lean on some cylinders. Another problem is my filter never gets dirty.

Is the EGR valve supposed to run during idle?

However, this EGR valve isn’t supposed to operate during idle, at wide open throttle or before the engine is warmed up. If it runs at any of these times, the performance of the engine is affected.

What causes a car to idle rough at idle?

A clogged fuel filter stops the engine from receiving the right amount of fuel causing the engine to be rough idle. Fuel filters are often pretty cheap, and you can easily get the fuel filter removed and replaced from a nearby mechanic or do it yourself if you have some knowledge. 6. Dirty Air Filter

Why does my car sputter when I Turn on the engine?

The fuel filter ‘s job is to filter the fuel going to the fuel injectors and then enter the engine. A clogged fuel filter can cause the engine to get too low fuel pressure or cause a clogged fuel injector. Low fuel pressure will cause the engine to run very leanly, and therefore it may cause the engine to sputter.

What causes the idle speed to randomly fluctuate?

It will cause the idle speed to randomly fluctuate to different speeds rather than stay at one constant speed. The idle speed may be too high at one moment and then too low at other moments.

Why does my car sputter and hesitate at idle?

I thought maybe it was that Sock thing clogged thats attached to the pump causing a problem in a specific operation range. -I should note that the car is running extremely lean regardless of the pressure of fuel going in according to my wideband. It is reading 18-20 AFR at idle .

What causes a car engine to sputter with low fuel pressure?

If your fuel pressure is too low, there is definitely something wrong with either the fuel filter or the fuel pump. If there is a leak around the intake manifold or at the hoses from the intake manifold, it may cause a too lean mixture, which will cause your car engine to sputter. The easiest way to find this is to use an EVAP smoke machine.

What causes a car engine to start spluttering?

Causes for engine splutter 1. Faulty spark plugs 2. Dirty fuel injectors 3. Vacuum leak 4. Dirty mass airflow sensor 5. Exhaust system leaks 6. Faulty catalytic converter 7. Dirty oxygen sensors 8. Worn out seals/gaskets

What causes engine hesitation and stumble problems on the 90 +?

Then it developed an intermittent hesitation problem- you would be cruising at 60mph, on a 400 mile trip, ease off the gas pedal, and suddenly for 1/4 second, it was as though someone had switched off the engine and then turned it back on again. The car would then run faultlessly for the rest of the trip.

Why does my Mitsubishi Starion have engine hesitation?

As another example, I still have a 1987 Mitsubishi Starion, which ran perfectly for 35,000 miles. Then it developed an intermittent hesitation problem- you would be cruising at 60mph, on a 400 mile trip, ease off the gas pedal, and suddenly for 1/4 second, it was as though someone had switched off the engine and then turned it back on again.

Why does my Car Throttle quit responding while driving?

Driving – cold: throttle respons is bad, then a few seconds later its OK,…. then no matter what speed I’m driving the throttle is all of a sudden not responding any more. It feels like my throttle is freezing up,….NOT litterally ofcourse,…..the foot-pedal pumping action works throughout this “freezeup” session.

How does the throttle position sensor work in a car?

The throttle position sensor is what monitors the throttle position from the shaft. Basically, this sensor is connected to a computer inside the vehicle which shares information sent by the driver. This information contains the actions of the driver such as accelerating, power steering and so forth.

How do I reset the Dodge Ram throttle position sensor?

To reset the Dodge Ram throttle position sensor, you turn on the ignition without your foot on the brake, so the engine doesn’t start. Press the accelerator on the floor for 15 seconds. Release the accelerator, then turn the car off and start the engine and drive.

What kind of diesel does a 2002 Dodge Ram use?

On 1998.5 – 2002 Dodge Ram pick up with the 5.9 cummins diesel there is a real problem with vp-44 injection pump failures. Several vp re builders lay the problem to heat failure & vibration due to solder joints crystallizing.

Are there any problems with the 2002 Dodge Ram 2500?

There is a good reason why Toyota is taking over the market. 2002 Dodge 2500 has problems with the diesel flow fuel problem. Since 48,500 miles the engine periodically loses power and drops to 1500 RPM’s. this failure mostly occurs with a load on board and when in traffic. The engine regains full power within 2-5 miles.

Why is my Dodge Ram 2500 diesel not working?

I have checked the codes on the Dodge Ram 2500 equipped with the 5.9L cummins turbo diesel and have found a P0216 code indicating the Bosch VP44 injection pump is not communicating with the ECM. There appears to be a defect in the VP44 computer talking with the ECM.

How does the throttle position sensor work on a car?

The collected data determines precisely how much fuel to inject into the engine at any given moment. If the throttle position sensor and its other sensor partners do their jobs correctly, your car accelerates, cruises, or coasts smoothly and efficiently, as you expect, while maintaining optimum fuel economy.

Why is my boat running slow at full throttle?

Even if your boat is operational, riding with a spun blade places the propeller at risk for damage. Depending on the severity of the problem, it could leave your boat dead in the water unless the problem is fixed ASAP. Have you checked your propeller for debris?

What causes idle surge on a high mileage engine?

Jumpy ignition timing from a distributor problem can set off idle surge. Worn out cam chain can also cause that timing to jump on very high mileage engines. 2. Fuel. Fuel is the easiest to figure out so I am going to start with it. Typically we either don’t get enough or we get too much. Not enough is typically weak fuel pump or low fuel pressure.

What causes an uneven idle on an F-150?

A uneven idle on a F-150 can be a symptom of a variety of engine issues such as vacuum leaks, failed or dirty sensors or worn engine components. If the engine is older or has higher miles on it, the typical culprits will be dirty sensors and carbon deposits on engine head components.

How to troubleshoot an idle that is going up and down?

Finding the ultimate cause of an uneven idle can be a trial and error process, but a cost-effective way to cure your F-150’s idle problems is to start by cleaning specific components to see if this restores a smooth and even idle prior to replacing components.

How to test the TPS on a Dodge Dakota?

You can test the TPS by hooking up a meter. You can try this to: with the engine idling tap on the TPS with your finger. If the engine races, it might be bad. Now let me tell about the idle: It was not a rought idle that was my problem, it was a jumping idle, but my main problem was the surging.

Why does the clutch disengage on a Dodge Dakota?

The TCM probably thought it was at WOT, a potition where the lockup clutch was supposed to disengage and therefore disengaged it only moments later getting the real voltage and reengaging the clutch. I wasn’t sure what the range of voltages was supposed to be but looking for the spike would show problem.

What causes a surging idle speed on a Honda?

What causes a surging idle speed on a Honda or Acura? Here, we’re addressing that complaint and what to look for when you run into this symptom. Honda has a unique programmed response to excessive idle speed, resulting in the distinctive Honda idle ‘surge’. Don’t be a parts changer and replace the IAC motor!

What happens when engine idle speed is above programmed range?

When the engine idle speed is either above or below the programmed range, the ECU prompts the ISC to either increase or decrease bypass airflow. Naturally, as the IAC prompts the throttle plate to open, engine speed increases. The IAC features a plunger mechanism that may be stuck/sticking.

Why is my Chevy 5.3 liter engine surging but no code?

I figured out how to induce it by letting off the gas and quickly giving it 1/4 throttle and about half the time this will cause the engine to surge. But it will not a throw a code and is beginning to drive me crazy. any help is greatly appreciated.

What causes engine hesitation on a Dodge Charger?

What causes an engine to surge at idle?

A surge is usually caused by a fuel system management or drivetrain operation failure. When an engine’s computer can “hunt” or “surge” at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system. SPONSORED LINKS. Article published 2017-01-26.

What’s the voltage reading on a Dodge engine?

The voltage that remains steady as you manually open and close the throttle is your supply wire. You should read about 5 volts. If you do not get any voltage reading, there is an open or short in the circuit.

Why does my Jeep Grand Cherokee surge to 2000 rpm?

I have a 2000 Jeep grand cherokee and it seems to always roar to 2000 rpm at startup, then sometimes the idle comes down to normal. But most of the time it will surge, untill i kick it down. It seems to do it more in the summer rather than the winter, but i think it may be coincidence.

How can I get my Dodge Ram to idle up?

4. Get a can of injection cleaner and lightly spray inside of throttle body around the plate/below the throttle body is a smile-like opening, get a flat head screwdriver and wrap it with a clean cloth and stick it in there and wipe inside of that compartment. 5. Start engine and slightly idle up 30 seconds). 6.

Can a bad TPS cause an engine to shut off?

Acceleration issues: A bad TPS may cause all sorts of power issues. Your engine may start up but it will have little to no power and it causes it to shut off. Unstable Engine Idle: Faulty position sensors can cause sporadic idle conditions due to fluctuating airflow.

Is there a throttle control problem in a 2006 SXT 3.5?

About a week after I bought my 2006 SXT 3.5 I left the car outside over night for the first time. It was a really cold night. In the morning I started the car up and the lighting bolt red light was flashing (no check engine light). A couple minuets later the car was not responding to to the throttle pedal.

Is there a throttle control problem on a Durango?

Also saw an 04 Durango show intermittent misfire issues. Changed plug wires, coils, cam and crank sensors, checked the wiring harness, the plugs, compression, alternator, battery…Never did know what the end result of that was, but I can ask tomorrow. Three green…

Is there a problem with the throttle body?

The Throttle Body Recalibration suggested in post #2 is a hoax…does nothing. I had this issue before on an 08 SRT8. The throttle was stuck shut. It was hart to push with my hand.

What causes engine to bog down when giving throttle?

Driving along at about 40-50mph and I go to accelerate and a get a shuttering/bogging down of the engine and have no real throttle. If I gently press down on the petal I can accelerate, but the moment I try and step on it I get the symptoms described above.

Why does my car not start when idle?

Low engine compression caused by worn piston rings, cylinders and leaking valves. Faulty coolant and/or air temperature sensors gives your engine computer incorrect information resulting in improper air/fuel mixture.

What to do if your car is stalling at idle?

Idle speed is set incorrectly. The Fix: Set idle speed to specs. There may be some type of ignition problem. The Fix: Check and replace distributor cap, rotor, ignition wires, and spark plugs. There may be a fault in the computerized engine control system.

Why do some diesel engines have throttle bodies?

Then why does some Diesel engines come equipped with a throttle body? Yes some modern engines have throttle bodies and some do not. The primary reason for its presence is emissions control and Exhaust Gas Recirculation (EGR).

Can a loose nut on a carburetor cause bad throttle?

The days of having to constantly adjust the throttle cable due to a loose nut on the carburetor are long gone. Today’s modern cars, trucks, and SUVs are all equipped with an electronic throttle control system that contains an accelerator pedal position (APP) sensor.

What causes bogging down when driving no power?

Bogging down when driving no power…. Idles fine pressing the gas pedal…. In first gear it has very little or no power …. It crawls ….checked oil & water there OK… Not over heating…im stumped …. Have you done an exhaust system back pressure test? Most parts stores sell the kit to DIY just follow the directions.

When does a Dodge Ram idle or stall?

Dodge Ram stalls or idles rough refers to when the Dodge Ram idles erratically, and in some cases, stops running as a result. This video details the 8 reasons why a Dodge Ram truck will idle rough or stall. The information in this video is specific to the 2001 2002 2003 2004 3005 2006 2007 and 2008 Dodge Ram 1500 2500 and 3500 models.

What does it mean when a Dodge Ram stops running?

What causes the RPM to fluctuate on a Dodge Ram?

It will also make your RPM’s fluctuate, cause the torque converter is locking and unlocking. How big of a RPM swing are you experiencing? Is it when you’re driving over 65MPH?

What should the RPM be on a Dodge Durango?

Also 100 RPM fluctuation max and it’s anywhere between 45-65 MPH. Several years ago I experienced a similar issue with my 99 Durango. The transmission was rebuilt under warranty by the dealer but it didn’t solve the problem. Turns out a bad O2 sensor was the culprit.

Why do my RPMs go up and down?

Clean your throttle body yes…but the symptoms (driving down the road at a steady mph) indicate a bad throttle position sensor or TPS…or wiring fault. If you have a volt/ohm, meter you can test it…google “testing a TPS” and tun the voltage test. You’ll also need some paper clips you can make probes out of.

Why is my C / K 1500 surging at idle?

TPS SENSOR BREAK INSIDE THESE THINGS AND CAUSE IRRATIC IDLE. THE IDLE AIR CONTROL IS ALSO NEXT TO IT PULL THAT AND ENSURE IT ISNT COVERED IN CARBON.IF IT IS CLEAN WITH CARB CLEANER

What happens when you change the O2 sensor?

The O2 sensor then sends information to the electronic control unit, or ECU, the vehicle’s computer. The ECU then adjusts the air-to-fuel ratio to optimize the fuel combustion. Sometimes an O2 sensor fails, and you need to replace it.

TPS SENSOR BREAK INSIDE THESE THINGS AND CAUSE IRRATIC IDLE. THE IDLE AIR CONTROL IS ALSO NEXT TO IT PULL THAT AND ENSURE IT ISNT COVERED IN CARBON.IF IT IS CLEAN WITH CARB CLEANER

When to reset the ECU after changing an O2 sensor?

Sometimes an O2 sensor fails, and you need to replace it. Once you’ve replaced your vehicle’s O2 sensor, you’ll need to reset the ECU so it can properly gather information from the new O2 sensor.

What kind of engine does a Dodge Ram 1500 have?

SOLVED: 2005 Dodge Ram 1500 4.7 Engine. Starts fine, Idles – Fixya 2005 Dodge Ram 1500 4.7 Engine. Starts fine, Idles fine, but when engine shifts into high gear and RPM lowers engine runs really rough under load My truck has a 4.7 liter code N engine. When I get on high way and accelerate I have lower power.

What should I do if my car Trimmer Idles but dies?

Trimmer: Engine Will Idle But Dies At Full Throttle If your trimmer engine idles, but stalls on throttle, check the following parts: the gasket, primer bulb, fuel filter, air filter, fuel vent, fuel line, and carburetor. The repair and symptom guide will help you better identify the part needed to be replaced and how.

Why does my car quit when I give it throttle?

And much of the time it doesn’t just quit…it act up for a while and then quits. Should be 500 ohms. If the mounting bolt gets loose it will test your brains until you check it, then run just fine. One troubleshooting tip…us a heat gun and gently warm the CPS and see if the motor runs differently.

What causes a car to lose power when idle?

A damaged gasket below a carburetor will pull excess air into the engine, causing the air/fuel mixture to be off and result in a loss in power. To check this, start by removing the air filter then loosen carburetor bolts.

What happens after idle when you give it throttle?

I found a local guy with a parts RZR , took all the electronic componenents and changed them and still the same thing. It is a 2008 model it would start and idle but that is all it will do. Ok what happend after idle? Need more discription of your problem. The simple thought is the TPS slipped. We need more information.

How to repair your trimmer when the engine will idle but?

Locate the adjustment screws. To adjust the carburetor, start with both screws backed out 2 turns from the closed position. One should be idle mix and the other should be high speed. Start the engine and let it warm up for 5 minutes. You may have to keep the throttle open a bit. Slowly turn in…

What does it mean when a car starts and idles?

It starts and idles like it is brand new. You can start to rev it up and o ce it hits a certain RPM it hangs there and backfires/sputters/pops/bangs/throws fire out the pipe. I pulled the plug and it was BLACK.

Why does my 2001 Warrior idle and die?

Hello I baught a 2001 warrior last month and it had problems with the spark..I changed my ignition coil and regulator and it went fine until I did an oil change last week.. It starts up, idles fine until I apply throttle then it revs a bit and dies.ANY HELP PLZ

Why is my Dodge Dakota idling and dying?

My dakota will start then idle down and die. I can pump the gas and it will stay running but if i hold the peddle down or let off it will die. I have replaced the fuel pump, fuel filter, and the idle air control valve. could it be the map sensor or o2 that is causing this please help. I have had the same problem, and this corrected it.

What causes the idle speed to be high or low?

What Causes Engine Idle Speed to be High or Low On a modern fuel injected engine, engine idle is controlled by the engine control unit (ECU) and an electrically operated throttle control module. When the idle is high or low, it could be caused by a malfunction of this system or any of the individual components that comprise the system.

Can you adjust an idle air control valve?

Ignite the engine again and adjust your idle speed screw at the throttle body by the use of the screwdriver. Adjust it until your engine idles at 675 rpm. Then, what happens when the idle air control valve goes bad?

Where do I Turn Off minimum idle speed?

If the speed is off, there is a torx screw on the side of the throttle body on the driver’s side. This is what needs to be turned to adjust minimum air (or idle speed). It comes from the factory with a protective metal cap over it.

Can a dirty throttle body cause an engine to stall?

A dirty throttle body may keep the computer from relearning idle. Idle memory adapted to the building layers of debris, in the throttle body, over time. If idle-memory is lost, the PCM may no longer be able to obtain the necessary throttle setting. The engine may stall or idle very low.

What causes a car to have an idle surge?

Air Supply A clogged or obstructed air filter can cause surging at idle, and foreign objects can enter the filter housing at any time. Any debris in the filter or housing might restrict air flow to the engine enough to affect idle speeds. Fuel filters can become restricted and deny proper delivery at idle speeds.

What happens when idle speed is below minimum?

Idle speeds below those specified by the manufacturer will affect the performance of the power steering pump, alternator and AC compressor. Emission control devices also require a minimum engine speed for effective operation. Surges that accelerate engine speed could cause unexpected vehicle movement.

Why does my car stall at the idle speed?

Fluctuations in engine idle speed can be annoying and may even cause stalling at idle. Engine stalling can be dangerous, because power assistance is lost to the steering and brakes. Idle speeds below those specified by the manufacturer will affect the performance of the power steering pump, alternator and AC compressor.

How can I increase idle speed in a Chrysler?

If the resistance is outside that range, the idle control motor needs to be replaced. Use a bidirectional scan tool to increase idle speed in a Chrysler. Connect a bidirectional scan tool to the same OBD port you would plug a code scanner into. Use the command in the scan tool to increase the engine’s idle.

What causes a vacuum to surge at idle?

Any extra air entering the intake manifold will lean the mixture at idle and surging will result. A visual inspection of vacuum hoses may reveal cracked or leaking hoses.

What’s the idle speed on a Yamaha bike?

The bike hasn’t been running to my knowledge for 4-5 months. Prior to my purchase the previous owner, a friend, said he cleaned the carbs. Basically, she’ll start up fine and idle around 1500-2000 rpm (full choke) but upon going to 1/2 choke or giving her any throttle, she dies.

What happens if you don’t let the Turbo Cool Down?

This will cause damage to the blades inside the turbo and eventually wear down the turbo until it breaks. Not Letting the Turbo Cool Down. After a long drive or aggressive driving, you should never switch the engine straight off. Always let the engine idle for a minute or so. Otherwise the turbo will be deprived of fresh oil as its spooling down.

Why does my Turbo make noise when I idle?

Always let the engine idle for a minute or so. Otherwise the turbo will be deprived of fresh oil as its spooling down. Overtime this will cause unwanted stress to the turbocharger. Even the smallest cracks in one of the pipes coming too and from the turbo can cause issues.

What does it mean when your engine idle is too low?

If your idle is too low, it could be the IAC not talking to the computer correctly. Disconnect the IAC connector for a couple seconds while your engine is idling. If your engine idle didn’t change, you can suspect it to be the IAC. If it is working properly, unplugging it would cause your idle to freak out.

How can I tell if my idle control valve is working?

To check if an idle control valve is working properly, start by turning on your engine and letting it run for a minute or 2. Then, when it’s at an idling speed, take note of the RPMs in your car. Next, turn the engine off and disconnect the idle control motor under your hood.

What should I do if my idle control motor is disconnected?

The engine should still start and run without any issue despite the idle control motor being disconnected. Be sure to tuck the wiring you disconnected up in the engine bay so it doesn’t get caught in any moving parts. Look for a difference in idle speed.

Why does the kickdown linkage move farther forward at idle?

If you set the kickdown linkage to almost bottom out at WOT it’s pulled MUCH farther forward when at idle, this is because of that larger radius. Part throttle acceleration isn’t much different than idle so the kickdown linkage with that outer hole position hasn’t moved to even where it would be at idle with the correct radius.

What does it mean when your car Idles smooth?

Smooth idling indicates that your engine’s fuel and air are mixing just right. What is rough idling? If your vehicle’s idle is rough, possibly rising and falling, or having difficulty maintaining a steady rate of rotation, you may have a problem that needs fixing.

Is the warrior Idles fine when trying to accelerate?

The warrior idles fine. I’ve adjusted to air mix screw back and forth. It changes the idol but doesn’t seem to improve things when I try to rev it up. 2.25 turns seems to be the sweet spot, as far as idol. The needle is where zoom put it.

What makes a car start and stop at certain RPMs?

And It occurs at certain RPM’s and not throttle position.It starts to rev,hits a certain RPM and stops.I can put it 1/4 throttle,1/2 throttle,full throttle and it does the dame thing. And QM…the only thing I have changed recently was that I put a new clutch in…

What are the symptoms of a bad idle control valve?

$0.00 1 Irregular idle speed One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. 2 Check Engine Light comes on Another symptom of a potential issue with the idle control valve is an illuminated Check Engine Light. 3 Engine stalling

Why is my idle control not working on my car?

If the idle has not changed at all, it’s likely because your idle control motor has not been functioning. If the idle control motor was working, disconnecting it should have created a difference in the engine’s idle. This test confirms there’s an issue with the idle control motor, but not what the issue may be.

What are the symptoms of a bad throttle temp sensor?

Symptoms of a Bad or Failing Throttle Body Temp Sensor Common signs include poor engine performance, stalling, and broken electrical connections. A common problem that car owners experience is high or low engine idle. A damaged intake gasket, cold air intake, or PCV valve can cause idle issues.

Why is my throttle control not working properly?

Your mechanic has extensive experience with throttle control system trouble and can resolve these issues. Because the connection between the gas pedal and the throttle is electrical, any disruption of the signals coming from the pedal will affect its acceleration. The throttle may operate properly at some times, but not at others.

What can I do about slow pedal linkage?

If it is ‘slow to center” but does center eventually, and does not creep once the control is centered, then, as others have said, the problem fix could simply be to spray lube all linkage components, including the shock absorber, pedal pivots, etc., which is where I would start.

Why does my ATV idle higher than its supposed to?

The same principle applies whether you have a wet disc clutch or a dry clutch as you find on a belted CVT transmission. If the ATV, for some reason, idles higher than it’s supposed to, it may cause the clutch to engage slightly, putting a small but constant tension to the metal gears inside the gearbox.

Why does my Raptor idle when trying to accelerate?

Sounds like the accelerator pump isn’t working, or pilot is partially plugged, or air mixture is too lean. May be a combo of several of those things. When my sons Raptor was doing that, it was because the pilot was too small, then had to tweak the air mixture to get it just right.

What to do if your bike Idles when trying to accelerate?

Clean the carb,run some sea foam through it,if that doesn’t work,try your timing.if all else fails it could be a sticky valve and or a bent valve ( I ran a bike on a bent valve for 2 months before it blew) How do you check the valves. I’m not a mechanic but I can do the small stuff. Lol I have a 89 warrior. I put it in the shed during deer season.

When to move throttle control to slow or fast?

Move the application throttle control to the slow position, then to fast. Check the engine control to assure it stops against the high idle RPM stop bracket. NOTE: When the application throttle control lever is in the slow position the engine governor spring must be free of tension or pushing pressure. A non- free spring can affect the RPM.

When do Motors gradually increase to full throttle when throttle?

On Sunday, March 13, 2016, borisbstyle [email protected] wrote: issue. When I used cleanflight’s motor tab and increase throttle automatically keep going up until it reachs full throttle. When I try to fly it, after hovering for a second or two it flips. I don’t know if its the new cleanflight or betaflight. One thing I did different in this

What does throttling on the Internet really mean?

Internet throttling is the act of purposely slowing down internet service. This is usually done by Internet Service Providers, but in some cases an internet user may want to throttle their own service.

Why does my car shudder at 40 mph?

The only issue was that the car would shudder pr even buck a bit ONLY at speeds around 40 MPH and ONLY when the accelerator was backed off of slightly and when an attempt was made to feather the pedal and maintain a steady speed. This was traced back to a light film of corrosion on a coil wire.

When does your car hesitate at 45 mph?

I started getting a hesitation/bucking in my 2001 F150 SCREW 5.4L 96,000 miles. It does it most often when you are barely on the gas at 45 to 50 MPH and then you press the gas to accelerate. It hesitates for a second and then takes off.

Why does my Ford F150 shudder at 45 mph?

Are there any stall posts on a Lincoln Navigator?

There’s a few stall posts over in the Lincoln Navigator Owners: Problems & Solutions discussion. This one for example (but only when the engine is cold?). Thx.

What are the symptoms of a bad throttle body?

A bad throttle body may cause stalling in the vehicle, misfiring, electrical problems, high or poor idle, and improper throttle stop. Issues such as grime and dirt deposits or vacuum leaks can also cause problems to the throttle body. Below, you will find some further information about throttle body diagnostics.

Why does my 80457s 600 CFM not idle?

The carb idles fine while warming up, but when choke is open & engine is hot, still cannot set curb idle. As I slowly increase curb idle to keep engine from stalling, opening throttle after every 1/8 turn, it will go from barely running to about 2000 rpm & stay there for about a minute or so & then idle down on it’s own & start to die.

What happens to the engine when the engine is idle?

These passages all serve different purposes, depending on the state of the throttle setting, such as idle, part throttle, and full throttle. When the engine is at idle the throttle plate is almost completely closed, limiting the amount of air entering the carburetor’s venturi.

When to increase curb idle to keep engine from stalling?

As I slowly increase curb idle to keep engine from stalling, opening throttle after every 1/8 turn, it will go from barely running to about 2000 rpm & stay there for about a minute or so & then idle down on it’s own & start to die. If I increase another 1/8 turn or less it will go up to 2000 rpm & stay there.

Why does my Nissan truck not go past 2500 rpm?

1. Wont go past 2500 RPM 2. No power while pressing gas pedal 3. Sometimes stalls at a red light 4. Hesitating badly the problem was a weak fuel pump , after replacing it the truck start it right up and was running strong , problem was fix.

Are there any problems with the Lincoln Navigator?

Their 2007 Lincoln Navigator began to have electrical problems, and they had to replace the alternator. The owner of a 1999 Navigator reported that there was no solution. They frequently cleaned the battery cables as many experts recommend, and even replaced them on multiple occasions, but couldn’t stop the corrosion.

What should I do if my engine is surging?

There may be a fault in the computerized engine control system. Check engine control systems with a scan tool. Have a mechanic test the circuits and repair or replace components as required, since this is generally not a DIY job. The fuel filter may be partially clogged. This is an easy fix! The fix: Replace the fuel filter.

What to do if the EGR valve is stuck?

EGR valve may be stuck open. The fix: Replace EGR valve. Drive axles may be loose or worn. The fix: Check and replace CV/universal joints as required. The fuel injectors may be dirty. The fix: Clean or replace fuel injectors.

What should the idle speed be on a Ford Mustang?

The car idle at 1100 to 1300 rpm now, but I would like to get it lower if possible. When I release the throttle while braking for a stop sign the tach does not drop right away and when I come to the stop they drop to about 1500 and stay there for a second then drop down to 1200 or so.

Is the Ford AOD transmission factory calibrated?

B&M builds and ships a remanufactured AOD transmission with new clutches and bands, seals, and any hard parts as needed, including bushings, bearings, and roller clutches. These transmissions are factory calibrated and ready for operation.

What should spacing be for Ford AOD transmission?

The T86L-70332-A gauge tool is 10 mm in thickness, which means the cable end and adjuster should be 10 mm (25/64 inch) apart. You can make this tool yourself using flat washers stacked to this thickness and achieve the correct spacing, which should yield 33-psi pressure. Then test-drive and pay close attention to shift quality and timing.

How does an AOD affect the transmission package?

An AOD behind an FE or 385 makes the transmission package 1 to 2 inches longer because you’re adding 1 to 2 inches to the bellhousing through the thickness of the adapters.

How can I keep my car at idle?

Step 3 – Engine vacuum is a sealed system and must hold a specific amount to maintain proper idle conditions, inspect the engine vacuum hoses and intake gaskets. Step 4 – The air intake boot or tube is used to deliver air to the intake system of the engine.

How to troubleshoot an automotive engine high idle?

The troubleshooting procedure for high and low idle conditions are similar, which are included in the following: Step 1 – If the check engine or service engine light soon has illuminated retrieving the diagnostic trouble codes could lead you in the right direction of what the problem is, or is related too.

Why are my Revs not dropping with the throttle closed?

It sounds like a vacuum leak. (a lean condition). One could surmise that this same lean condition could be caused by some crud partially blocking your fuel passages, but then you’d still need extra air. (Maybe the throttle blades have always been a little bit too open to compensate for some issues with the carb, and it is now coming to light?

What to do when your revs are not dropping?

I adjusted the cables and magic perfect idle again. A tip on the weights determine if the mechanical advance is the problem is to warm bike up return throttle to off hit kill switch then wait till engine completely stops and without touching throttle crank bike.

What causes a car to run lean at idle?

If the root cause is an electrical problem within the idle air control valve itself, you will likely have to replace the IAC. A vacuum leak is a hole in a vehicle’s air intake system behind the mass air flow (MAF) sensor that allows unmetered air into the engine. This throws off the expected air fuel ratio and causes the vehicle to run lean.

A throttle position sensor is similar to the motor cortex in the human brain, it controls one of the most important components of the car that keeps your engine running like a throttle body. Picture a little module in the car that reads how far down you have pressed the gas pedal.

Why does my Ford F150 keep stalling?

One of the most common issues your Ford F150 is likely to develop is a stalling problem. The most challenging part of diagnosing a stalling problem is reproducing the conditions that led to the stall in the first place. Stalls can happen at any time, and it can be incredibly jarring when it does happen.

What happens when a TPS sensor goes bad?

The data provided by TPS is invaluable for proper starting, idling, and easy throttle response. These operations are affected when a bad throttle position sensor feeds erroneous data to the car’s computer. Because of this, the following can occur: 1. Difficulty while changing gears.

Can a bad check engine light be a bad TPS?

The check engine light will randomly turn on and off even if the car is running smoothly without any jerks and stalling. This is often the first ever symptom of a bad TPS. Using a code reader, you should be able to confirm whether a faulty TPS is the culprit or a different component.

What are the symptoms of a bad ford TPS?

Symptoms Of A BAD Ford TPS. The most common symptom is the CHECK ENGINE LIGHT (CEL) is on (also known as the MIL=Malfunction Indicator Light) on your instrument cluster and annoying the heck out of you as you drive. Among other things, your vehicle might be experiencing: TPS diagnostic trouble codes (DTCs) stored in the vehicle’s computer’s memory.

Why does my 6.7L diesel lose power?

SOME CUSTOMERS WITH 6.7L DIESEL EQUIPPED VEHICLES MAY EXPERIENCE A PERCEIVED LOSS OF POWER/HESITATION/ENGINE SURGE WHILE DRIVING. THIS MAY BE THE RESULT OF THE POWERTRAIN CONTROL MODULE (PCM) RECEIVING INPUTS FROM BOTH THE BRAKE AND ACCELERATOR PEDALS AT THE SAME TIME, ACTIVATING THE BRAKE OVER ACCELERATOR (BOA) FEATURE.

Can a 2 foot driver lose throttle response?

If you are a 2 foot driver providing input through the gas and brake pedals at the same time you can experience the condition you are experiencing as you could be activating the BOA protection of the PCM. Remember that input from the brake pedal will always win…

When did the f350drw lose its throttle response?

F350DRW, built in Jul 2010, over 6000 miles mostly towing, first oil change at the dealer. Went to exit dealer, required left turn into traffic with slight upgrade, lost all power and had to pull onto shoulder to avoid BIG 18-wheeler. That was too close………..

What happens when you shift your transmission hard?

When the transmission shifts hard, it can damage internal components including valve bodies, hydraulic lines, and in some cases mechanical gears. If you notice your transmission is shifting harshly or roughly, you should contact a local ASE certified mechanic as soon as possible.

What to do if your F-150 is shifting too hard?

Figure 1. All Ford trucks come with an info sticker in the driver side door jamb. Turn your truck off and look at the instrument panel. Keep your OBD II code reader handy. If the O/D light is flashing, go to the O/D light diagnostic. If you’re getting a trans fault error, pull codes with your reader to see what’s wrong.

Can a faulty sensor cause a hard shift?

Faulty Sensor – Many vehicles today are equipped with loads of sensors that communicate to their internal computers, including some that influence the transmission to shift. If the sensors are not functioning properly or receiving the incorrect data, it can cause rough shifting.

What happens when you replace the throttle body?

If you replace the throttle body, the PCM won’t know and will continue to use the adaptive settings as if the carbon buildup is still in place. If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle.

Why does my car idle at 700 rpm?

There is an air filter which prevents debris from the air from getting into the chamber. But if this air filter is dirty or clogged, then there will be less clean air passing through it. This will cause the engine to idle rough. Your engine should normally get to around 700 RPM after you start the vehicle.

What is the problem with the idle air control valve?

The problem may involve an annoying change (up/down) of engine speed while cruising at a steady pace, a low drop (or even cut-out) at idle or when approaching a stop, a wild high engine speed of several thousand rpm followed by a drop to near zero, etc. • Dirty/sticking IAC (idle air control valve) (P0505)

Is it normal to have a rough idle?

This is definitely not a normal situation. If you are experiencing a rough idle or your RPM is running high, then there are a variety of reasons for why this could be happening. It is not always easy to diagnose the cause because there are so many factors involved here. Below are the top 5 causes that a mechanic would look for.

Why does my car idle at a higher RPM than normal?

Updated January 19, 2019. If your car seems to be revved up to a higher-than-normal RPM while idling, it’s not necessarily a problem. If this problem happens while the engine is cold, it may be part of the engine’s design.

Why does idle speed drop during cold startup?

If the idle air control valve did not compensate for these, the idle speed would drop when certain accessories are used. In severe cases, the engine may even stall. The idle air control valve is most important on a cold startup. Problems with the idle air control will be most obvious during this time.

How often does the engine idle during a drive?

• The learned idling air flow volume remains at the maximum or minimum volume five times or more during a drive cycle. • After driving at 6.25 mph or more, the actual engine idling speed varies from the target idling speed by between 100 and 200 rpm, five times or more during a drive cycle.

What should I do if I have engine surge?

Finding the cause of an engine surge problem can be time-consuming. However, some strategies can help you get to the root cause of the problem. Pay special attention to systems in need of maintenance, like ignition, fuel, the PCV, and air cleaner systems. Sometimes, a simple maintenance procedure can fix the problem.

Why does the idle go up after cleaning the throttle body?

The idle is going to be high at first until the computer relearns the idle again. Cleaning the throttle body allowed more air to enter the engine, and the computer is compensating by adding more fuel.

When does an idle air control valve malfunction?

As soon as you start your car, the idle air control valve will immediately malfunction. If you happen to be away from home and this happens, the stalling will happen every couple of minutes in the beginning. You should be able to make it to the nearest mechanic in time before the engine stalls completely.

Can a bad air control valve cause an engine to stall?

Sometimes the engine stalling will happen on its own while other times, increasing the load on the engine will cause it to stall. For example, if you turn on your heater or air conditioner when you have a bad idle air control valve, then your engine will probably stall immediately afterward.

Is it normal for a Mazda 3 to idle at 750?

The car is suppose to idle at 750. That is normal for it. 1k seems really high except for on a cold start. But once it is warmed up it should be at 750. now 500 is way to low and will stall you out. Have you checked your MAF wires? One or more of them may be pulled. Also, have you tried running some fuel system cleaner through your car?

How to fix a Mazda that stalls at stop?

Remove the air hose from the throttle body. Disconnect the throttle body connector. Remove the throttle body from the intake manifold, with the water hose connected. Clean the throttle body on the air hose side using a soft, clean shop cloth, sprayed with engine cleaner (Mazda recommends their P/N 000-77-A86).

What are the symptoms of a lousy throttle system?

So, let’s see some significant symptoms that indicate a lousy throttle system. If the throttle body has any problems, then you will feel less power in driving. You may see the power reduced alert on the power gauge of your vehicle. In that case, it’s the throttle body that needs to fix.

Why does my Trafic engine not Rev properly?

As engines run on fuel mixed with air, you can see that if the MAF is faulty or dirty and giving an incorrect reading, it can have a pretty major effect on how the engine runs. The most common complaint with these vans seems to be that they sometimes are low on power—especially below 2500 RPM—and sometimes won’t rev properly.

What causes white smoke from exhaust when idle?

What Causes White Smoke From Exhaust When Idle? If you have white smoke from exhaust when stopping or idling, your combustion chambers engine might get oil inside, which cause them to burn off the exhaust. This will cause white smoke, along with the idle issue.

Can a bad speed sensor affect shift timing?

Harsh or improper shifting. Without a valid speed signal from these sensors, the PCM will not be able to correctly control the shifting of gears within the transmission. This may cause the transmission to shift roughly or more quickly than normal. It’s also common that a problem with these sensors can impact the shift timing,…

How to fix a 2006 F 350 6.0 diesel engine?

2006 F 350 6.0 diesel hesitates, stutters when giving fuel around 1800 to 2400 rpm. Have re-manned ficm with 50hp boost. Has run great for months. Start up a grade and add fuel…engine stutters and lightly bucks. Does not have the power as normal. New oil, both fuel filters, clean air raid air filter, no codes…

Why does my Ford truck have a sluggish feel?

Air filters play a crucial part in how your car performs and are directly related to gas mileage and torque. These components are subject to wear and can often get dirty. When they get really dirty, they get clogged, thus preventing the air to flow easily into the engine, which results in a sluggish feel.

Why is my Ford F-250 losing power?

Use an OBD2 Tester to scan the codes. Diesel particulates in the exhaust are trapped by the Diesel Particulate Filter (DPF). Regeneration is the method by which exhaust temperatures are increased so the particulates are expelled. This can be a major source of loss of power and fuel economy.

What causes a diesel engine to stutter when idle?

This problem is caused by a MAF sensor or even a clogged file pressure rail check both and if those aren’t your problems then it could be bad diesel or your idle control is bad check all of the above and replace all if possible You can’t post conmments that contain an email address.

What happens if you have a bad TPS sensor?

Acceleration issues: A bad TPS may cause all sorts of power issues. Your engine may start up but it will have little to no power and it causes it to shut off. On the other hand, it can also cause your car to have spontaneous accelerations even if you didn’t step on the gas.

What happens when a fuel sensor goes bad?

In most cases when your sensor goes bad, you will see the vehicle consuming more fuel than usual Warning lights: The check engine light is designed to warn you when any sensor goes bad. If the check engine light turned on in your car, then it’s important to check it out before the issue gets worse.

What are the DTC codes for the throttle position sensor?

TPS diagnostic trouble codes (DTC’s) stored in the vehicle’s computer’s memory. P0121: Throttle Position Sensor Performance. P0122: Throttle Position Sensor Circuit Low Voltage. P0123: Throttle Position Sensor Circuit High Voltage. Really bad gas mileage. Transmission does not shift out of second gear.

How to fix a surging engine in a car?

Easy step by step guide on how to repair an automotive engine that is surging, this information pertains to most vehicles and is listed in the order of popularity. Start with the vehcile on level ground, engine “OFF” in park with the emergency brake set, wear protective gloves and eye wear for safety.

What causes an engine surge when the ECU is off?

If closed TPS voltage changes, the ECU may assume that your foot is on the throttle, causing a richer fuel mixture to be delivered. This can also be caused by a faulty TPS, or even a poor ground. With the engine off, check TPS voltage with the accelerator pedal relaxed. Then work the pedal a few times and see if the voltage changes.

When to set DTC for engine surge maintenance?

• After driving at 6.25 mph or more, the actual engine idling speed varies from the target idling speed by between 100 and 200 rpm, five times or more during a drive cycle. • If the actual idling speed varies from the target idling speed by more than 200 rpm five times or more during a drive cycle, the ECM illuminates the MIL and sets the DTC.

Are there any problems with the Ford Escort?

However Ford has been unable to pull any codes, and wants an outrageous amount to check the car system by system. The car runs and drives fine, however occasionally on the highway the car will surge, as if the fuel supply were being momentarily cut off.

What’s the Abt on a Ford Escort engine?

When the eng is switched off it keeps running for abt 3 seconds before it stops, and the tach goes all the way to the high side of the gauge. When the eng is restarted the tach does not move until you rev the eng up to abt 2,000.

Why does my Ford Escort stall at a stop?

Also when the car is warm sometimes I have to really crank and crank the engine to get it to start. Recently the car has started stalling if you don’t veeerrryyy slowly take off from a stop when the engine is cold. Any ideas? Hello forum crew.

Why is the Check Engine light coming on on my Ford Escort?

The check engine light has been coming on for quite sometime. However Ford has been unable to pull any codes, and wants an outrageous amount to check the car system by system. The car runs and drives fine, however occasionally on the highway the car will surge, as if the fuel supply were being momentarily cut off.

What should idle speed of NATO Turbo Coupe be?

The engines idle speed should settle in around 1000 RPM. 10- Take the Turbo Coupe for a test drive. Brake Bleeding by Martin Bokesch On the brake bleeding, the antilock system requires a bit different approach than conventional brakes.

How does the idle speed of an engine work?

The engine’s idle speed is controlled by how much air is allowed to bypass the throttle via the idle bypass circuit in the throttle body. The PCM monitors idle speed and operates a solenoid or small electric motor to move a valve that regulates airflow through the air bypass circuit.

What should the voltage be on a turbo tuner?

Connect the voltmeter to the TPS and ground. The wire should be the one with a green strip. 5- Using the small Phillips screwdriver adjust the TPS output voltage to approximately 1.0 volts. Most turbo tuners find that setting your voltage to around 0.90 – 0.95 volts works best.

What causes rough engine idle or TDC code?

So, should the engine misfire, rough engine idle or (TDC) code; point to an air leak in the intake manifold gasket, following the below directions. A very common cause of a leaking intake manifold is the gaskets and bolts used from the factory.

When to do a Ford throttle body relearn?

Make and Model > Ford, Lincoln, Mercury > Aviator > Ford throttle body relearn… If you’ve replaced your Ford electronic throttle body or you’ve disconnected the battery, you must do a Ford throttle body relearn to establish a new baseline idle.

What causes an engine to vibrate at rough idle?

It only takes a minor problem like a fouled spark plug to cause your engine to vibrate. Idle problems may originate in a worn out component, a failed part, or a blown gasket. The number of potential sources of a rough idle can make your diagnostic a little difficult.

What to do if your Ford engine is running at idle?

Hook up a portable trouble code tool for your specific Ford make and model. Look for any trouble codes that appear while the engine runs at idle. Write down any code number and look it up in a trouble-code manual. Most times, code numbers can pinpoint the exact system failure or miss in the engine.

Can a bad crankshaft sensor cause engine to run rough?

You will feel, and maybe hear, this as a brief stutter in the engine. You might feel that the engine runs rough or vibrates at idle, say, when you’re sitting at a red light. This is similar to the above in that it stems from poor spark timing. As seen with rough idling, sometimes crankshaft position sensor problems are worse at low engine speeds.

Is there a high idle mod for a Ford truck?

Fortunately, the High Idle Modification is a fairly simple one, with Ford Truck Enthusiasts forum member “ Ryaneverk2 ” detailing the project for a fellow forum member, and many others have made use of his information since that initial post.

What are the symptoms of a bad accelerator pedal?

Symptoms of a Bad or Failing Throttle/Accelerator Pedal Position Sensor. Common signs of a faulty pedal position sensor include inconsistent engine response, reduced fuel efficiency, and the Check Engine Light coming on. The days of having to constantly adjust the throttle cable due to a loose nut on the carburetor are long gone.

What’s the idle RPM on a Ford truck?

That one will vary the idle from 1200-2400 depending on current draw, in order to keep the battery charged properly. Some have noticed that their RPMs will creep up and up all the way to 2400, slowly, even when the current draw is staying steady.

Why does my Ford F 250 have hesitation?

Hesitation, or a lack of throttle response, is a symptom with many causes. We list the common ones for gasoline and diesel Ford F-250’s below. This article applies to the Ford F-250, F-350 Super Duty (2004-2014). Hesitation and power loss are signs that something is wrong, and if left unfixed, can get worse.

Why is my Ford engine stumbling at idle?

Weak or worn spark plugs, weak coil, dirty injector, and so on. It can be issue with IAC ( idle air control valve) causing the problem. There are many other possibilities causing these idle issues. Engine idles rough. There are few help links with solutions to troubleshoot such idle issues.

This is controlled by the engine’s computer. Sometimes parts go bad, which results in your car idling strangely or stalling. Check to see if your idle control valve is functioning properly before attempting to replace it. Look for a high engine idle. A common symptom of a faulty idle control valve can be a high idle.

Why does my Ford F-250 have a hesitation when stepping on the gas?

Mass Air Flow Sensor removed from intake tubing. From the factory, some motors just have poor throttle response, which gives the feeling of hesitation when stepping on the gas pedal. A performance tuner can not only improve throttle response, but can improve the overall performance.

What makes a car sputter at the throttle?

If throttle, most likely carbs. 3) Bottom line – something has changed… any changes you have made recently, or anything you’ve overlooked telling us? I checked all the rev limiters.

How is the gas pedal connected to the throttle body?

In those vehicles, the “gas” pedal isn’t connected to the throttle body by a cable. The pedal simply provides an electronic signal, telling the throttle body how much acceleration you’re requesting. A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request.

How does the throttle body work on a Ford?

The pedal simply provides an electronic signal, telling the throttle body how much acceleration you’re requesting. A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request.

What kind of accelerator pedal does Ford Excursion have?

This ItemAPDTY 700314 Accelerator Pedal & Position Sensor For 2001-2003 Ford Super Duty & Excursion 7.3L Diesel… There was a problem filtering reviews right now. Please try again later. We have a 2001 F2 50 diesel truck.

When is a bad throttle position sensor a warning sign?

Engine won’t idle smoothly, idles too slowly, or stalls If you start to experience engine misfires, stalling, or rough idling when the car is stopped, it can also be a warning sign of a failing TPS. You don’t want to wait to get this checked out!

How does Ford throttle body relearn procedure work?

During the period the PCM will command the throttle body plate to sweep from full open to full close to “learn” the new positions. 5) Start the engine and let it idle for a full 10-mins until it reaches full operating temperature. During this period the idle may be higher than normal.

How to install a new throttle position sensor?

Install your new sensor by working backward through the removal steps. Start by installing the sensor using the mounting screws. Next, connect your sensor to your vehicle’s electrical system using a convenient electrical connector. You should be able to easily push it together and hear a distinct click. Check to ensure a firm connection.

Why is my injector pulse not working on my car?

Ans: Having a stuck or clogged injector is a very wide known problem that happens because of the accumulation of carbon build-ups that coming out from using a low-grade fuel, so regularly using a fuel system cleaner can help you in this mission.

How do you test a fuel injector ( ANS )?

Ans: By using a simple diagnostic tool called NOID light, this tool detects a digital signal coming from the ECU and flashes an LED light, so if there is no LED flashing during cranking, this means that there are no pulses coming out of the ECU. Question: How do you test a fuel injector?

How to test the 3.0L Ford throttle position sensor?

Troubleshooting and testing the throttle position sensor on your Ford or Mercury with a 3.0L V6 engine can easily be done in three tests and without a scan tool. That’s right, no scan tool needed for these tests.

How does the TP sensor work on a Ford?

As you let go off the accelerator pedal to slow down, the throttle plate closes and of course the TP sensor sends the info to the PCM as it returns to its base voltage signal, till the whole cycle begins again. Pretty easy stuff? The cool thing is that the tests to check out the TP sensor’s performance are as easy too.

Where is the idle air control valve located?

Remove the connector to the IAC valve, located right below the Throttle Position Sensor (TPS) on the left side of the throttle body as you are looking at it from the front of the car.

When to adjust the throttle position sensor ( TPS )?

The TPS should not need adjustment, but once the idle screw has been tampered with, the TPS should be adjusted to match. If the idle is low and the TPS is high lots of problems will appear.

When to replace idle control motor in Ford?

Fords are designed to operate with the resistance in the solenoid in a range between 7.0 to 13.0 ohms. If the resistance is outside that range, the idle control motor needs to be replaced.

What should idle stop be with high TPS?

If the idle is low and the TPS is high lots of problems will appear. If you need to grossly modify the TPS mounting holes to adjust Closed Throttle between 0.6-1.0 volts, you should recheck the idle stop screw first. Values were calculated for VREF = 5.0 volts. and VREF variations.

What causes a 7.3 power stroke engine to not start?

7.3 Power Stroke Diesel Common Problem #1 : Causes No Start : Injection Pressure Regulator (IPR) Valve, located in the valley on the High Pressure Oil Pump (HPOP). These can stick, seals get damaged, have the sensor go bad or the wires get damaged.

What to do if your Ford Focus has no acceleration?

Clean the Map sensor and clean the throttle body . Check your o2 sensors. You can also check for back pressure on the fuel tank . test this buy running the car without the fuel cap . there could also be a plugged Catalytic convertor. Is the car overheating when this is happening ?

What’s the idle RPM on a Ford Focus?

With the engine warm, stationary idle (car not moving) is 700-750 rpm. If the car is in motion, the rev’s will only drop to 1500 at the lowest, until the vehicle speed is 15 mph or less, which is fine. I still have 1 problem though, and it has to do with the Air Conditioning affecting engine behavior.

Why does my focus engine shake at idle?

About 2 weeks ago my idle has gone to crap, the rpms will dip very very low when at idle and my engine literally shakes because of it and will stale at times. If i apply a bit of throttle it will smooth out and run ok..

What causes a focus to stall at idle?

It tells the PCM (Powertrain Control Module- the car’s electronic brain) how much air the engine is ingesting. The most common cause of stalling and poor idling, as has already been stated, are vacuum leaks and the PCV hose is a common source on the Focus.

What makes an internal combustion engine not start?

To operate efficiently, an internal combustion gasoline engine needs a good spark, the right amount of fuel, and good compression (a healthy mechanical condition). The lack of any of these three things will prevent your engine from starting.

What causes a Chevy 6.0 Vortec engine failure?

1. Throttle body sensor failure – Chevy 6.0 The throttle position sensor (TPS) is located on the throttle body and is responsible for controlling air flow into the engine. The TPS sensor monitors how open the throttle is (ie. how much air is entering the engine) and relays the information back to the ECU.

What happens when engine RPM drops below 800?

However, when the engine RPM drops below the normal range of 800 RPM (for most cars), it is more than likely that you are dealing with an IAC valve problem. In cases where this valve is clogged or is failing, your vehicle will stall instead of slowing to an idle after the release of the throttle.

When do I stop at red light RPM drops?

But when i stop at light rpm drop to 500. And feels like its going to shit off. My car has 80455 miles. My car has an automatic transmission. This may be a sign of a failing idle air control valve.

Why does my Ford 6.8L V-10 stall at idle?

RE: Ford 6.8L E-series cutaway bus chassis with PennTex charging systems. Service Issue: 6.8L V-10 stalling out at idle or when decelerating to a stop with PX-5 alternator.

What to do when your car rpm goes down?

Hey friends if your car RPM goes down to zero then do following steps. 2.Make it Throttle body clean 6.Check if there is any gas leakage near by your car engine. Do All the above your car will be smooth and there will be no problem related to RPM. Was this answer helpful?

Why is my Ford 6.0L Powerstroke not working?

Ford’s 6.0L Powerstroke came with Hydraulically actuated electronically controlled unit injectors (HEUI), similar to the 7.3L Powerstroke. These injectors are prone to static friction, or stiction, which is the result of carbon and sludge build up within the HEUI injectors’ spool valves.

Why is my Ford F-250 hesitant to start?

How does a 6.0 liter diesel engine work?

The 6.0 Power Stroke diesel engine utilizes a single vane VGT (Variable Geometry Turbocharger), which is designed to reduce turbo lag and create better throttle response. When a turbocharger starts to fail it will have the same symptoms as a bad EGR valve.

Why did my F350 6.0 diesel engine die?

This happened to my buddy’s F350 6.0 Diesel and it was due to the inner fuel tank liner failure and pieces clogged the injector pump and injectors and I think they said it looked like silver paint. Bulletin Summary: LACK OF POWER DUE TO LOW FUEL PRESSURE – FUEL TANK LINER SEPARATION.

Why does my 2005 F350 diesel not start?

I realize it is two years too late, but I have at 2005 F350 Super Duty Diesel that had a similar issue – it took more than 2 years before a mechanic could figure it out – it was the “ICP” sensor – the Internal Control Pressure Sensor. Strange idling (rpms down and up) and would not start shortly after turning it off.

Are there any problems with the Ford 6.0L Powerstroke?

If you’re a diesel nut like me, you probably know that most people will steer clear of buying a 2003 to 2007 model year Ford Superduty Diesel truck. The 6.0L Powerstroke is known for having major problems. Most of these problems originate from the factory design.

How does throttle bore work on car engine?

Step 5 – A throttle bore is used to regulate the volume of air flow the engine consumes. Controlled either by computer or by manual foot pedal this device must be clean and free from coking build up (light tar substance.)

When to call a mechanic for bad throttle control?

This could cause a serious safety hazard, as the driver is not able control the speed or acceleration of the vehicle. When this occurs, you should pull your vehicle to a safe place off the road and contact a mechanic as soon as possible to inspect why throttle control is not consistent. 2. Engine does not run efficiently

Why does my car engine run rough while idling?

When your car engine runs as it should, everything should be smooth without any noise. When any number of things goes wrong, the engine can start running rough, especially while idling. By understanding the causes of a car engine that has a rough idle, you can resolve the issue easily.

How does the PCM control the idle speed?

The PCM monitors idle speed and operates a solenoid or small electric motor to move a valve that regulates airflow through the air bypass circuit. If the ISC valve is gummed up with fuel varnish or dirt, it may stick, preventing the engine from maintaining the proper idle speed when the throttle closes.

What does it mean when idle control does not increase?

If the engine idle does not increase, it means there is an issue at the idle control motor of its circuit preventing the signal from changing the idle. You can purchase a bidirectional scan tool at your local auto parts store. Make sure the wiring harness is firmly connected to the idle control motor before conducting this test.

What does sputter, idle, hesitation under load mean?

Well, I have been having the same problems that many of us on here are having with an iradic idle, hesitation under load, and sputtering up to like 3000 rpm. My idle was so bad it started dieing on its own.

What does low idle or fluctuating idle Ford mean?

Ford reports that the symptoms show as an idle speed that drops below the recommended speed or the vehicle exhibits a fluctuating idle. The vehicle may or may not store the following trouble codes: Ford has issued updated parts to fix the problem. Alldatadiy.com and Eautorepair.net are the two best shop manuals—period!

What should my idle AFR be on my car?

-I should note that the car is running extremely lean regardless of the pressure of fuel going in according to my wideband. It is reading 18-20 AFR at idle . Should be 14.7 like it was before, I haven’t changed any tuning with HP Tuners and I know that my injector constant is correct.

What to do if your CTS engine hesitates?

If the mechanic suspects the throttle position sensor, he or she will test the throttle position sensor and it’s wiring to see if it is functioning properly. If it is not, the mechanic will remove the throttle positioning sensor and the wiring and replace them.

Can a poor fuel pressure regulator cause a Ford to stall?

A poor fuel pressure regulator can also cause your Ford to stall while idling or driving. While it will most likely occur while idling, it is not unheard of for the car to stall while you are driving down the road.

What to do if your car is idling too fast?

A throttle body cleaning is likely to cure the high idle speed as well. There are many possibilities when your engine is idling too fast. Here are some common ones to help guide you towards the root of the problem.

What are the most common Ford Triton engine problems?

Common Ford 6.8 Triton V10 Engine Problems. 1 1. Triton V10 Spark Plug Blowout. Pre-2002 V10 Triton engines have an unfortunate design flaw within the cylinder head and spark plug designs that can 2 2. Triton Cracked PCV Hose. 3 3. Triton V10 Exhaust Manifold Failure.

Is the 6.8 Triton V10 engine reliable?

8 Triton V10 Reliability. Is the 6.8 Triton V10 reliable? Overall, this engine is well built and is highly reliable. Outside of the common spark plug blowout issue, there aren’t really any costly problems that the 6.8 Triton is known for. The spark plug issue can be fixed preventatively with a repair kit that costs a few hundred bucks.

Why does my car take so long to return to idle?

Poor carb sync is the most common reason for your complaint. The reason for this is that when the carbs aren’t synched well, one or more cylinders have to compensate for the underperforming ones (at idle). This gets the harder working cylinders into the progression of fuel circuits (at idle) to maintain proper curb idle.

Why does my Silverado go slower past half Trottle?

The truck starts, idles, and revs normally and when accellarating slowly everything works just fine, but once you get past half throttle it falls on its face and acts like it has a clogged fuel filter or bad fuel pump. It actually goes slower than below half throttle. The bogging gets consistently worse the more throttle you give it.

Why does my Ford 7.3 stall while driving?

I have had to replace several cam position sensors on 7.3 and 6.0 ford diesels. They start ok, but stall, sometimes they run fine for a while and then when they get warm, they quit. Ford even had a recall on the cam sensor (at least here in Canada) maybe call your dealer and see if it is covered.

What’s the idle rate on a 96 Ford Ranger?

96 Ford Ranger 6cyl 3.0 w/ 117,000 miles. Started to idle high at 2000 to 3000. Sometimes it comes down to normal, sometimes not. Noticed I could literary take my foot of the gas pedal when doing 40 or 50 and it would not slow down.

Why is the idle speed of my car so high?

Step 2 – The idle air control motor (valve) is responsible for controlling the engine idle speed, if this part fails or becomes weak the engine idle speed could become erratic, additionally, this condition may or may not trigger the MIL (check engine, service engine soon light.)

How to test TPS signal in Ford 5.0L?

TEST 1: Testing The TP Signal With A Multimeter. TEST 2: Making Sure The TPS Is Getting 5 Volts. TEST 3: Making Sure The TPS Is Getting Ground. The TPS Code Won’t Go Away. Where To Buy The TPS And Save. More Ford 5.0L And 5.8L Tutorials.

Why does my 93 F150 302 hesitate and surge?

EGR works properly. This problem is only in closed loop. While the engine is cold everything seems to work fine. I can open the throttle a bit, say 1500, and there’s a surge, or maybe you could call it an “anti-surge” where the rpms will drop a bit and engine roughens up a bit, then it goes back up and smooths out, then cycles back down.

How does the throttle position sensor work on a Ford?

OK, in a nutshell, when you crank and start your Ford vehicle: The throttle position sensor gets 5 Volts and Ground from the ECM. As the engine in your pickup or van idles (and the throttle plate is closed), the throttle position sensor sends the ECM a voltage signal of about 0.9 to 1 Volts.

It will cause the idle speed to randomly fluctuate to different speeds rather than stay at one constant speed. The idle speed may be too high at one moment and then too low at other moments.

What does it mean when your engine idle does not increase?

Use the command in the scan tool to increase the engine’s idle. If the engine idle does not increase, it means there is an issue at the idle control motor of its circuit preventing the signal from changing the idle. You can purchase a bidirectional scan tool at your local auto parts store.

Are there any problems with a 7.3 liter diesel engine?

The legendary 7.3 Power Stroke Diesel engine, when properly maintained can provide years of trouble free service. However there are several common problems that can develop over time. Generally speaking these can all be resolved relatively easily. Listed below are 9 common problems of the 7.3 Liter Power Stroke Diesel engine.

Why does my car not exceed 3 rpm?

The RPM doesn’t exceed 3 on the dash board when idling, and rpm doesn’t exceed 2 when in motion. What is the cause? Hi There, It sounds like you may have a problem with your transmission causing it to go into limp mode which will not allow the car to exceed a specific RPM or speed when driving. The transmission control module will…

Are there any problems with the Ford 7.3 power stroke engine?

It’s also important to note – the Ford 7.3L Power Stroke diesel engine earns high remarks for reliability. They are great engines, however problems can and do occur. Fortunately, most issues with the 7.3 Power Stroke are relatively simple, cheap fixes.

When does the RPM go back to normal?

The RPM will usually go back to normal as you accelerate the vehicle, but will increase again after you stop. This is definitely not a normal situation. If you are experiencing a rough idle or your RPM is running high, then there are a variety of reasons for why this could be happening.

How long does a Ford 7.3 Powerstroke last?

Nonetheless, the 7.3 PowerStroke has a B50 life of roughly 350,000 miles. In other words – about 50% of these 7.3L engines last longer than 350,000 miles. That’s pretty respectable even among diesel engines that are known to outlast gasoline engines. Ford 7.3L diesels are strong internally and have what it takes to last.

What are the DTCs for Ford throttle position sensor?

TPS diagnostic trouble codes (DTCs) stored in the vehicle’s computer’s memory. P0121: Throttle Position (TP) Circuit Performance Problem. P0122: Throttle Position (TP) Circuit Low Input. P0123: Throttle Position (TP) Circuit High Input. Really bad gas mileage.

What causes an engine to stall at idle?

When the valve fails, it may get stuck close or open, or even leak. It is when the valve remains open when engine idle suffers. Sometimes, the engine may stall at idle because of the lean of the air-fuel mixture.

What causes low ICP on a Ford PowerStroke?

1. Refer to other hard start or no start issues below 2. IPR (Injection Pressure Regulator) bad, will cause low ICP. Buy 7.3 IPR Valve 3. IPR o-rings bad, will cause low ICP. Buy IPR O-ring kit for 7.3 Powerstroke 4. Injector o-rings bad, will cause low ICP. Should also show up as black fuel (from oil in fuel) in fuel filter canister.

What causes white smoke while cranking a Ford PowerStroke?

1. DTC P0340 and/or P0344- Usually a bad Cam Position Sensor. We have seen several aftermarket CMP sensors cause issues such as no start or a miss and white smoke at higher RPM. Buy 7.3 Powerstroke Cam Position Sensor 2. Are you getting smoke while cranking (after about 10 seconds) if no smoke then no fuel is getting into the combustion chamber. 3.

Why does my ECM say idle all the time?

This allows the ECM to remember all the “idle”, throttle position and store the DTC status. There was also a download update if memory serves for some of the 2007 or 2008 models regarding an idle issue, so check with your H-D dealer for Service Bulletin regarding this.

Why is the RPM on my Harley Davidson so high?

(Could be you went through 50 key cycles with no engine issues) When you get off the interstate & the idle is high,,, if you were to power it off and restart the bike, does the idle calm down or does it resume the high idle. Would help to know how high the RPM was, but you have no tach. (?)

What to do when your engine RPM drops?

Engine have fuel problem . Somewhere the fuel drop then suddenly rpm decrease better check the complete fuel system from tank to injectors also check the rpm sensor . Was this answer helpful? check fuel pressure between fuel pump and injectors. you may have a fuel pump that is about to fail.

Why does my Ford F-150 run at high idle RPMs?

High idle rpms please help!!! screw and got it down to about 1,100 rpm. I unplugged the IAC and the truck runs when i let go of the gas pedal the rpms are still up and the truck goes by itself. doesn’t seem to be any vacuum hoes leaks.

What are the RPMs on a Ford F-150?

First start after sitting overnight. Rpms go up the down right away to about 300 then back up to about 900. Put truck in reverse and truck stalls out. This does not occur every time. Does the same when I put in drive

Why does my Ford F-150 rev up after sitting?

Just take off high rpm shoot up an if it goes into neutral zone. First start after sitting overnight. Rpms go up the down right away to about 300 then back up to about 900. Put truck in reverse and truck stalls out. This does not occur every time. Does the same when I put in drive

What should the idle RPM be while idling?

You can get a cheap gauge at an auto part place that will quickly tell you if you are in spec. Idle air control..it should idle at 1000 rpm’s when the engine rpm’s jump up and down,suspect the iac. Thanks for contributing an answer to Motor Vehicle Maintenance & Repair Stack Exchange! Please be sure to answer the question.

What’s the throttle position sensor on a Ford Ranger?

The throttle position sensor (TPS) on the 1998, 1999, 2000, and 2001 2.5L Ford Ranger (Mazda B2500) pickup truck is a simple 3-wire component. It can be easily tested with a simple multimeter and that’s how I’ll show you how to test it in this tutorial.

How does the TPS work on a Ford Ranger?

In a nutshell the TPS is designed to measure the throttle plate angle as it opens and closes. In its closed position, the TP sensor produces a voltage signal of about 0.2 to 0.5 volt DC. This voltage signal increases as the throttle plate opens.

When does Ford Ranger engine hesitate during acceleration?

Ford Ranger Engine hesitates during acceleration Inspection at your home or office. Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM. Our certified mobile mechanics can come to you now. Ford Ranger Engine hesitates during acceleration Inspection costs $89 on average.

What are the symptoms of a bad throttle position sensor?

A faulty throttle position sensor sends incorrect information to the ECM resulting in various issues in the engine, its performance, and fuel economy. Below are common symptoms of a faulty TPS. In most of the cases, all of these symptoms will show together making it easier to detect the faulty component. 1) Car Jerks

What does hesitation mean on a Ford truck?

Hesitation and power loss are signs that something is wrong, and if left unfixed, can get worse. Usually, regular maintenance will prevent any problems, but like anything else sometimes things slip by or just fail prematurely.

Why is my Ford F-150 engine hesitating?

Figure 5. Mass Air Flow Sensor. Just like your air filter, if your fuel filter is dirty your engine will not have has much power. A clogged fuel filter can cause rough idling, reduced fuel economy and hesitation issues. Figure 6. F-150 fuel filter.

Why does my F150 shake when I idle?

Why an F150 shakes when idling. If you notice that your F150 is shaking more when it’s idling, then it may be caused by: EGR sensor sticking: When the EGR sensor is dirty or damaged it causes the EGR valve to stay open. The valve and sensor must be cleaned with a climtool or replaced to correct this concern.

What to do when your F150 shakes and shudders?

Replace joints by removing the bolts and nuts from the end of the drive shaft, then remove the shaft itself. The joints will remain attached to the drive shaft. Spray WD-40 on the joints at the end. After you have removed the U-joints, clean up the ends until they are nice and shiny.

Why does my Ford EcoBoost shudder when I Turn on the engine?

After doing research by talking with Ford employees, auto technicians and reading through various forums, the cause seems to be the Charge Air Cooler (CAC). This CAC cooler cools the intake air as it goes through the turbocharger. This cooled air then travels into the engine.

Why does my Ford F150 shake when I idle?

Here are the main components of the ignition system, as well as what would cause them to make your F150 shake when idling. Fouled plugs can cause a misfire, which in turn causes an idle shake. Spark Plugs – One of the absolute most common causes (if not the most common reason that your F150 may be shaking) is the spark plugs.

Is there an issue with my 93 F150 302?

My 93 F150 302 has an issue with a slightly rough idle, a slight hesitation when pressing the gas, and a surging when at a constant throttle position. I’ve replaced the entire ignition system, including the distributor and verified the plug wire routing, replaced the TPS and EGR position sensor.

What should the idle speed be on a 1996 F-150?

Engine running, check for leaks, nope, all looks good. On fast idle, thats Ok. Few seconds, and good, I hear it ease on down to normal idle. Playing some seeming “new” problem. When I tap the gas, 8 seconds, then eases down to normal idle of 700-800.

Is there a problem with my 1996 F-150?

Also watch a bolt hole the first go-arond. Start it up, and see what happens. Starts ok (still seemed to have that wide open throttle. Oh well, will deal with later. Engine running, check for leaks, nope, all looks good. On fast idle, thats Ok. Few seconds, and good, I hear it ease on down to normal idle. Playing some seeming “new” problem.

Why does my Ford F-250 have power loss?

This article applies to the Ford F-250, F-350 Super Duty (2004-2014). Hesitation and power loss are signs that something is wrong, and if left unfixed, can get worse. Usually, regular maintenance will prevent any problems, but like anything else sometimes things slip by or just fail prematurely.

What are the signs of a Ford F-250?

We list the common ones for gasoline and diesel Ford F-250’s below. This article applies to the Ford F-250, F-350 Super Duty (2004-2014). Hesitation and power loss are signs that something is wrong, and if left unfixed, can get worse.

Why are my RPMs so low while idling?

Typically air leaks result in poor mileage. Thanks Nick, you nailed it. After a good cleaning with throttle body cleaner the fluctuations stopped, but the RPMs were still low. I finally replaced it (Ford calls it the IAC valve, stands for idle air control valve) and it’s been running like a champ ever since.

What causes an engine to idle up and down?

A malfunctioning MAF sensor can cause a wild up/down engine idle speed (say, 0-2,000 rpm). This might be caused by a loose harness connection or by a damaged or contaminated sensing wire. The MAF sensor measures the amount of air flowing through the throttle valve.

When to idle air control at 1000 rpm?

Idle air control..it should idle at 1000 rpm’s when the engine rpm’s jump up and down,suspect the iac. Thanks for contributing an answer to Motor Vehicle Maintenance & Repair Stack Exchange!

What are the symptoms of a bad TPS?

Below are common symptoms of a faulty TPS. In most of the cases, all of these symptoms will show together making it easier to detect the faulty component. Jerking or bucking of the vehicle is the most common symptom of a bad TPS.

Why is the idle speed on my Chevy Too High?

Other times, the idle speed could be too high, causing the engine to spend more gas than usual. You can adjust the idle speed to the factory specifications, or to your personal preference.

What should the idle speed be on a GM TBI?

What causes a truck engine to miss at idle?

I put truck on a scanner and watched the cylinders. # 1 misfires at idle but quickly stops misfiring at around 1000 rpms. you can here the engine miss at idle but truck runs great on road . anyone else ever had this problem? You can’t post conmments that contain an email address.

What should TPS voltage be with closed throttle?

The voltage with closed throttle should be between 0.400 and 0.625 volts for most applications (check appropriate reference guides for your application’s specified voltage range). If the voltage you get is not within spec, loosen the TPS retaining screws and adjust as necessary.

What causes the vacuum level to drop at idle?

Engines that have higher compression or are new/rebuilt can have higher internal loads/friction which can also result in a drop of idle vacuum levels. Basically any condition that increases load on the engine will result in the vacuum level to drop at idle, which will require the IAC or throttle blade to be opened up to compensate.

Can a failing TPS cause a car to stall?

It can be difficult to tell the difference between a failing TPS and a malfunctioning or clogged idle air control (IAC) valve, so electrical testing and cleaning of the IAC is recommended. As mentioned, a failing TPS can result in random engine stalling at idle, but this can also happen under driving conditions.

How to change the accelerator pedal release position?

Accelerator Pedal Release Position Learning Procedure. Make sure that the accelerator pedal is fully released. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds.

What kind of noise does a GMC Yukon make?

Recently I noticed a thumping noise from the right passenger area that is present with the car is at idle (it is not loud enough to be heard if the car is moving) and when the ignition is on but the engine is off. Any thoughts? Wasn’t sure where to post this but we just last week a 2004 Yukon.

Can a GMC Safari ignition control module wear out?

The ICM can wear out over time and cause misfires. Sometimes the ICM is fine, but it overheats because there is not enough grease under it to help it dissipate the extra heat. This video shows you how to replace the ICM ignition control module on your GMC Safari or Astro van. It’s an easy job to do. The new ICM costs around $50. Loading…

How much does it cost to replace the ICM on a GMC Safari?

Sometimes the ICM is fine, but it overheats because there is not enough grease under it to help it dissipate the extra heat. This video shows you how to replace the ICM ignition control module on your GMC Safari or Astro van. It’s an easy job to do. The new ICM costs around $50.

Why is my Ilde so bad at idle?

Also very hard to start because of periodic ‘backfire’ while cranking that brings engine to standstill. Idle is perfectly smooth for first 1 – 2 minutes after overnight cold start, before missing at idle starts. Missing and hesitation worse the hotter it gets. Turning on air condtioning makes ilde worse, with more frequent stalls.

What happens when you hesitate at the throttle?

5) While driving at normal road speeds (after the hesitation) or accelerating and the throttle is not fully closed, there is no miss whatsoever, and the engine performs very smoothly. While ever the throttle is partially or full open, the engine performs very smoothly and with normal power, apart from the initial hesitation.

Why does my GMC Safari idle all the time?

While there are a variety of reasons your GMC Safari has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. 34%. of the time it’s.

What causes rough idle after replacing fuel injector?

So, whether you have replaced the Spider fuel injector assembly (or the fuel pressure regulator) and are experiencing a rough idle that wasn’t there before or you’re about to take the intake manifold apart, this article will:

What happens when you replace the Spider fuel injector?

So, you replaced the fuel pressure regulator, or the entire ‘Spider’ fuel injector assembly and now, when you start the pickup (SUV, van or mini-van) it idles very rough!

What are the symptoms of a bad Vortec Spider injector?

Symptoms of Bad Vortec Spider Injectors 1 Misfire engine codes (P0400-P0406 and P0300 codes) 2 Long starting, hard cranking 3 Poor idle and running at low-rpm’s, but fine at high rpm’s

What causes a vibration in a 6l transmission?

Other sources of a vibration include insufficient damping or isolation of the engine or driveline, an irregular combustion event, and Active Fuel Management (AFM) disturbances. TIP: DEXRON 6 is the only approved automatic transmission fluid (ATF) to be used with 6L transmissions (RPO MYA, MYB, MYC, MYD) at this time.

Why does hp power limit throttle not work?

Another device called “Intel (R) Power Engine Plug-in” cannot be disabled, but only uninstalled, which also didn’t fix the power limit throttling, and also caused autorotation to stop working. Also trying to change the HP CoolSense mode from off to on and back off, also made no difference.

Is there a time limit for thermal throttling?

Your CPU is thermal throttling, not power limit throttling. Open up Limit Reasons and move your laptop around and see if the type of throttling changes. This is a locked CPU so the default multipliers of 40, 40, 37, 37 are fine. Increasing them does not change anything. Default turbo time limit is 28 seconds.

What kind of car has no throttle response?

stephenmpls July 4, 2016, 9:25pm #1 I’ve got an ’04 VW Golf that has recently taken to occasional bouts of no throttle response from the accelerator pedal. This has happened a handful of times during the past few months and until this morning occured only while driving on the highway at a constant rate of speed (~58-60mph).