Why does my car run when I release the gas pedal?

It would sometimes run normally if I release the gas pedal and press it again. What could be the problem? Thank you. It sounds like you may have an issue with your throttle position sensor. This sensor sends a reference voltage to your power-train control module, which uses that to determine ignition timing and fuel trims.

What causes a 1989 Chev crew cab to stall?

I have a 1989 v3500 chev crew cab with a 454. Started stumbling at low throttle, stalling when I came to a stop or any low rpm activity. Checked for vaccuum leaks, reset base idle, tested sensor components, ran Win aldl diagnostics, could not get it to run right.

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.

Why does my transmission not shift into 2nd gear?

My 1998 Chevy Z71 with a vortec 5.7 has a problem. At first i thought it was the transmission but now i am relatively sure it has something to do with … read more Automotive Repair/Damage… I have 1985 Corvette with Automatic Tranny. Tran will not shift into 2nd gear. going up you let of gas and it shifts to drive or OD, and coming … read more

Why does my car not go into passing gear?

Somebody put in a Turbo 400 transmission but did not hookup the Neutral Safety Switch or the … read more I have a 2.2l 1997 Chevy Cavalier 4dr and I was wanting to know why my car doesn”t go into a passing gear, (downshift to a lower gear)or if there is any type of system that is on the car.

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

When to call a mechanic for a bad gas pedal sensor?

If any of these symptoms occur or your car isn’t responding accurately when you press the gas pedal, you should pull over immediately and call a mechanic. Here is a more detailed list of the most common symptoms of a bad accelerator pedal position sensor.

Why does my car not respond when I press the gas pedal?

You may not be noticing a delayed response from the pedal, but if you see low gas mileage, it could mean that the car’s throttle position sensor is working but not as accurate as it should be. Modern cars have a monitoring system over all the sensors in the car engine.

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

Are there any problems with the GM throttle position sensor?

GM Throttle Position Sensor Problems 1 Function and Location. Throttle position sensors (TPS) are usually located on the large butterfly valve that controls airflow into and out of an engine, called the throttle-body. 2 Inconsistent Idle. 3 Engine Stalling. 4 Erratic Shifting. 5 Maladjusted TPS.

Why does the gas pedal slam to the floor?

Many drivers complain that the gas pedal is too hard to press at first and then slam to the floor. Other drivers may notice that no matter how it is pressed, the gas pedal does not respond properly. More than likely, this is a problem with the throttle cable.

How does the fuel pump work in a car?

The fuel pump receives the fuel from the fuel tank and throws it into the fuel rail which transfers the liquid into the cylinders using the knowledge of the fuel pressure sensors. Naturally, if the pressure is not according to the manufacturer’s recommendations, you will experience little to no response from the car’s engine.

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

Under acceleration, the vehicle should accelerate smoothly no matter how hard or light the gas pedal is depressed. If the Ford will not accelerate smoothly, but instead jerks and jumps under acceleration, your fuel pressure regulator should be inspected. A poor fuel pressure regulator can also cause your Ford to stall while idling or driving.

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…

What causes a car to backfire through the intake manifold?

The accelerator pump in the carburettor does not supply enough fuel before the main jet kicks in. When intake manifolds were made out of aluminium, they were able to better handle this problem. In older models, triggering backfires is not all that challenging.

How to diagnose engine backfires with axleaddict?

Car owners usually forget to check the ignition system at the recommended manufacturer schedule. If necessary, consult your car owner’s manual or repair manual. Even if your Check Engine Light is not lit on your instrument panel, scan for possible pending diagnostic trouble codes that can guide you in your diagnostic. II. Injection System Problems

When does the carb pop during engine compression?

Popping/crackling through the carb during acceleration, cam, compression, or what? Discussion in ‘ Engine Topic ‘ started by Penix, Feb 14, 2009 .

What causes backfiring on a 2 cycle golf cart?

For the fuel and ignition systems to work properly together, the spark should be in the cylinder via the plug prior to fuel gets there. In almost all cases, whether it is a 2 cycle or 4 cycle engine, golf cart backfiring is caused by the accelerator cable being out of adjustment at the throttle plate of the carburetor.

What makes a GM 454 backfires a carb?

If a 4 barrel it might be the accelerator pump. I’mpretty sure Tim’s is a throttle body injection like mine. These look like a carb but are far from it. For that period it was GM’s answer to a carb and I think they worked better than a carb, but they came with their own problems.

Popping/crackling through the carb during acceleration, cam, compression, or what? Discussion in ‘ Engine Topic ‘ started by Penix, Feb 14, 2009 .

How to troubleshoot a car that does not respond to the gas?

Part 1 of 2: Visibly inspect the gas pedal 1 Look for visible obstructions of the gas pedal. Look for any obstructions or objects getting in the way of the pedal. 2 Look for visible obstructions of throttle. Open the hood and look for the throttle body. 3 Look for visible damages or deformities in system. …

What to do if your fuel pump is not working?

A faulty fuel pump will not push the gas needed into the lines and to the engine. Again, if this is the case, all of the throttle components may be working correctly but seem as if they are not responding. To repair the fuel pump, you will want to drop the tank or access it through the access panel (if equipped).

Why does my car not accelerate when I press the gas?

If the power-train control module is not detecting the proper signal from the throttle position sensor, the engine may not accelerate properly. I would recommend having your throttle body inspected by a qualified mechanic, such as one from YourMechanic to determine why your car is slow to accelerate.

Why does my Ford Explorer Jerk when I press the gas?

If your Ford Explorer is jerking when you press the gas, there are a few common issues that can cause this to happen. These include misfiring, fuel delivery issues, the catalytic converter, and more. Your Explorer’s engine is a pump. It mixes air and fuel together and needs a strong ignition of the two to run properly.

Why does my car not move when I step on the gas pedal?

There are many reasons why a car will not move when you step on the gas pedal and they vary from easily corrected to requiring a laborious repair. A lack of power often involves the fuel system in one way or another. It could be something as simple as an engaged emergency brake or as complicated as internal engine malfunctions.

What causes a Ford Explorer to not start?

Could be a host of things. Clogged fuel line, clogged fuel filter, fuel pump going out, restricted air filter, etc. That is the simple stuff which cost nothing to check. You can also clean the throttle body. Stop throwing parts at the problem until you find the problem.

Why does my Ford Explorer squeal when driving?

When driving a short distance you will hear a loud squeal like a belt slipping but that’s the transmission trying suck fluid that is not there because the TTC isn’t circulating trans fluid. 10 people found this helpful. Bad spark plugs dirty fuel filter,fuel injectors might need replacing, vacuum hose leak it could be a number of things

Why does my GMC Sierra suddenly stop running?

Truck suddenly stops running, acting like it’s out of fuel. There is fuel in the gas tank and, I can hear the fuel pump when I turn the ignition on. Is there a fuse, or relay that is maybe causing this to happen?

Where is the throttle position sensor on a Cadillac Escalade?

Throttle Position Sensor – The throttle position sensor is typically located on the gas pedal. This sensor is responsible for telling the engine how much air and fuel to allow in. It is very rare these days to be actually directly controlling the amount of fuel and air entering the engine directly.

What to do if your GMC Sierra stall?

If its a mechanical problem with the spring or pintle in the valve, it will not set a code for the IAC. If you decide to replace it. Your PCM will have to go through the relearn. Another words, it may take up to 5 miles of driving or 15 minuts for the idle to stop fluctuating. Good luck

What happens when you take your foot off the gas pedal?

Engine dies when I take my foot off gas pedal. lexus engi… Q: Engine dies when I take my foot off gas pedal. The engine dies when I take my foot off of the accelerator. Hello. If the engine runs fine when you are holding the accelerator pedal down and dies when you release it then you may have a couple of possible issues.

Can a faulty PCM cause low fuel mileage?

Since the fuel pressure regulator is given specific air/fuel mixture directions from the PCM, it should always maintain the proper mixture. A faulty fuel pressure regulator can also be to blame for a sudden decrease in fuel mileage. These symptoms can also occur with a plugged fuel filter, failing fuel pump, or faulty PCM.

What’s the problem with my 1997 Chevy Silverado?

I have a 1997 chevy 1500 siverado with a 5.7 vortec that has been having a problem for about 6 months now. 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.

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 car run when I release the gas pedal?