Why does my GMC Sierra 1500 stall at high RPM?

At higher rpm seem almost like the exhaust is clogged but the cat has been bored, itll rev up but just wont really go. Today experienced a poping sound almost like a backfire from underneath. After the truck starts and is warm at a stable idle in park/neutral it’ll rev up fine.

What does the fuel smell like in a GMC Sierra 1500?

If so pull the air filter off and sniff the throttle body for a fuel smell. If the diaphragm has ruptured it will literally be like putting a hose with fuel into the intake and running it full.

What causes a motorcycle to stall at idle?

Extremely lean motors can also stall out completely when given some light throttle. Another sign of lean running is the “hunting idle” where the motorcycle revs up randomly, changes RPMs, or takes forever to come down to idle.

Why is my throttle cable going bad on my bike?

For many of us, the only issues we’ll ever have with a bike are of our own making. Up until very recently, most bikes have had at least two cables that can go bad and cause headaches: the throttle, and clutch cables. The throttle cable normally lets you know it’s going bad by refusing to snap back the throttle grip when it is turned and released.

Can a car stall with a bad throttle position sensor?

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. A faulty throttle position sensor will not let your car accelerate normally. Though this doesn’t happen all the time.

What causes a carburetor to stall when accelerating?

If the engine either hesitates or stalls upon acceleration due to the carburetor, the carburetor’s accelerator pump nozzle may need to be cleaned or the secondary throttle plates may not be closing all of the way. Occasionally, the carburetor’s idle jet will become clogged with dirt, which will cause the hesitation or stall.

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.

How can you tell if your transmission has failed?

A good way to tell if this is the case is to look at the vehicles RPM on the highway. If the needle moves up and down with the most minor of rpm input change, than it is likely that the locking mechanism has failed. It feels so different going down the highway that it can be confused for a lack of overdrive.

What does it mean when your transmission Cant shift into fourth?

If it can’t shift into fourth anymore, that means that there is a mechanical issue at hand. These things wear out and eventually even a well maintained automatic transmission will fail. We’ll cover them below.

What causes a Chevy Tahoe to stall at a stoplight?

These were just some of the most common ones. A dirty throttle body can lead to stalling in your Tahoe. If you let off of the gas coming to a stoplight and it stalls for a second or two and recovers itself, it very well could be a dirty throttle body that is causing the problem.

Are there any problems with the Chevy Tahoe?

One time had to run off into the ditch to avoid an accident. Took it to the dealership and they said “Nothing in the computer to tell us what to fix”. They don’t even care.

Why does my Chevy Tahoe not kick over?

It was shutting off on us when we came to a stop. Then eventually it just wouldn’t kick over. So, then a friend of ours who is a mechanic told us to knock on the fuel tank and if the car started rite up then it was the fuel pump. Again, with the help of the manuel I was able to change myself.

What’s the idle speed on a Chevy Tahoe?

Ive replaced plugs, wires, rotor, distributor cap, O2 sensor, Catalytic converter and the muffler that was rusted out while I was down there. It runs and sounds better but…The idle is a little rough, but not much. The idle stays pretty much at 600-700 in drive, a little higher in park.

Is the p1391 code related to temp?

IT IS RANDOM, NOT TEMP RELATED.I HAVE WIGGLED ALL WIRES BETWEEN BOTH SENSORS ,AND ECM. Thanks. The P1391 code can be set for a number of reasons, unfortunately. You’ve already replaced the two sensors, so they shouldn’t be a problem at this point. I’ll shoot you a short list of things I’d check, let me know if any stick… Harness problems.

What does rough idle mean on a GMC Sierra?

rough idle, stalling, loss of power. o2 sensor code 44 (lean) Replaced: coolant temp sensor, tps, map sensor, fuel filter, and o2 sensor. It will run normal on occasion but only lasts about 45 seconds or so.

What kind of truck stalls at highway speeds?

I own a 1998 GM Sierra 5.7L 2wd automatic. My truck intermittently stalls while idiling, city speeds and at highway speeds. The idle stall has started in the colder months ( I live in Canada). I can start the engine right away and it runs perfectly until the next time it stalls.

What causes a Chevy Silverado to stall at low speeds?

You might have a bad IAC valve. (idle air control valve) The PCM retracts the pintle in the valve constantly to maintain desired rpm idle, and rpm at low speeds. Its a 4 wire valve bolted on to the throttle body. 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.

Why is my Caterpillar 3208 low RPM engine leaking?

Hoses and clamps associated with the boost compensator on the fuel injection pump may also be leaking, a problem that’s easy to spot when the engine is running. Finally, there may be a restriction on turbo boost (or some part of the exhaust system) or the engine’s valves may simply need adjusting.

How to check low idle RPM of Caterpillar engine?

Engine rpm must be checked with an accurate tachometer. NOTE: The correct Low Idle rpm is given in the TMI (Technical Marketing Information) or Fuel Setting And Related Information Fiche. Start the engine and run until the temperature of normal operation is reached. Check low idle rpm with no load on the engine.

Is there excessive smoke in a Caterpillar 3208?

There is no excessive smoke, no excessive blow-by, and no intake or exhaust blockage. Moreover, I’ve done an impeller change, consulted with lots of mechanics, but still the problem remains. What’s going on?

What happens when the diaphragm is ruptured on a GMC Sierra?

If the diaphragm has ruptured it will literally be like putting a hose with fuel into the intake and running it full. When it initially started to go it probably slowly flooded the engine to where it seemed to run ok but the excess fuel created a ton of carbon coating the O2 sensor. Since no air could pass through it, it gave a false lean reading.

What kind of idle does a GMC Sierra have?

After the truck starts and is warm at a stable idle in park/neutral it’ll rev up fine. But the stable idle won’t last long, it’ll idle low and rough. Mpg has decreased drastically and give off a rich smell when running.

Why does my GMC engine start but not run?

Repair guides and support for cars, trucks, and SUVs manufactured by GMC. Answered! View the answer I have this problem too Is this a good question? An engine will start but not run when the fuel runs out .

Why does my 1988 GMC Sierra 1500 not start?

I’m having the same problem with my 1988 GMC 1500 I was told its the starter I’m going to replace it I guess that will determine if its the starter ornot just wwish I had a for sure wayof knowing 37 people found this helpful. Having same issue. Changed out starter two days ago. Still is a hard start. Sometimes I need starter fluid

What to do if your GMC Yukon Denali won’t start?

48 people found this helpful. I have a 2000 Gmc Yukon denali, 5.7 litter, it cranks but won’t start it does have spark in coil, but No spark in #1 sparplug I put new distributor and new coil new sparplugs, new plug wires,checked out fuses there all good]

Is there a defect in the GMC Acadia?

The lawsuit claims GM has been aware of the defect since at least May 29, 2018, when the manufacturer issued a Technical Service Bulletin warning customers that the vehicles may not shut off when the vehicle is put in the “Park” position.

What causes intake manifold gaskets to wear out?

As the vehicle acquires mileage, the intake manifold gaskets may wear out and eventually leak. This can cause major performance issues, as the intake manifold gaskets seal engine vacuum and pressure.

What should I do if my intake manifold is failing?

If you suspect that your intake manifold gasket or gaskets may be having an issue, have the vehicle inspected by a professional technician from YourMechanic to determine if the gasket should be replaced. The most popular service booked by readers of this article is Vehicle Engine Mechanical Inspection.

Why does my GMC Sierra 1500 stall while in gear?

Motor wants to stall while in gear (but doesn’t do it out of gear once over 1000 rpm it dosent) seem to stall and it is only from a dead stop. Fuel filter has been replaced and TBI was rebuilt last April but it sort of used to do something like this when it was like 40 degrees or below. Could be torque converter lockup solenoid in the trans.

Why does my GMC Denali run rough in the morning?

I have a 2001 gmc denali that runs rough in the morning – usually after it rains or sits (with humid weather). SES light blinks and code indicates all cylinders missing. Problem goes away after running 10-15 minutes (engine heats up). Dealer can’t figure it out – recent wires and plugs done.

What’s the problem with my Chevy Silverado stalling?

REPLACEMENT OF CONNECTOR WHEN REPLACING FUEL TANK MODULE/FUEL PUMP MODULE. *TT ROUGH IDLE, SERVICE ENGINE SOON (SES)LIGHT, UNSTABLE IDLE, HESITATION, SURGE OR STALLING. WITH DIAGNOSTIC TROUBLE CODES P0300, P0335 OR P0336. *TT AIRFLOW SENSOR PROBLEM. *EH DIAGNOSTIC INFORMATION FOR INTERMITTENT VEHICLE NO CRANK DEAD BATTERY. *EH

Why does my car stall after a few miles?

When a bad module is responsible for an intermittent stalling problem, the engine will usually cold start just fine and run OK for short distances, but stalls after driving more than a few miles or when driving at highway speeds (especially during hot weather). It’s as if somebody suddenly turned off the ignition.

Why does my 440 Mopar make a rattling noise?

MY 440 mopar runs incredible at idle to 1500 rpm, but around 2000 rpm, the engine becomes overcome with loud rattling, noise, thousands of “rocks gone wild” come from the engine or transmission. It sounds like the motor is falling apart.

Why does my Chevy Silverado make a knocking noise?

65 people found this helpful. for a piston slap you need to pull apart the motor and possibly either re-bore the cylinder with the bad piston or replace the entire block be cause of the damage done to the piston and the cylinder as the piston “slapped” against the walls of the cylinder most likely gouging the cylinder walls

Is there low end power on a C / K 1500?

No low end power untill I hit about 35mph then my engine seemed to wake up and scoot. 1998 C1500 5.0 A friend had the same problem and recommended changing the fuel injectors or spider as they call in on Chevy engines. I did, and the change was amazing. Try that, it’s not cheap but def worth it. Make sure you upgrade to an MFI unit.

Why does my Chevy C / K 1500 bog out under acceleration?

It always bogs under acceleration, wont peel out even when its wet, and must downshift to gain speed on the highway (but it still runs at the normal rpm range when on the highway). 16 people found this helpful.

What are the most common GMC truck problems?

One of the most common 2007-2013 GMC and Chevy truck problems owners experience is excessive oil consumption. This problem led vehicle buyers to launch a class-action lawsuit against GM, which alleged 2010-2013 vehicles with Generation IV 5.3 Liter V8 Vortec 5300 engines were defective.

How to check ignition timing on Chevy C / K 1500?

check the ignition timing. you have to find the spout connector to force the computer to stop advancing the timing and set at base then make sure the engine is at operating temp and idling properly. then find your timing marks with the light and adjust it if needed. 21 people found this helpful.

Why does my GMC Sierra 1500 stall at high RPM?