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 does my GMC Sierra stall when idling?
Stalling continues and now more often when idling, warm or cold. During idling the engine sputters and surges before it stalls. The dealer ship figures that the stalling and the PRV are two seperate issues. The only code that comes up is the faulty PRV.
What causes an engine to stall while idling?
This can upset the air/fuel mixture causing idle, stalling and hesitation problems. Cleaning the airflow sensor wire with aerosol electronics cleaner; can often restore normal operation and cure the problem. If the engine stalls while idling or driving, the engine may be running out of fuel.
Why does my 1993 Chevy TBI stall at idle?
Timing is steady and not jumping all over. It is a fuel issue. The only code that ever sets is a P044, lean exhaust, and the exhaust is really lean. We have swapped PCM/PROM with a same year Suburban, no change. Both vehicles run the same as this did using the other’s PCM.
What causes a Chevy Suburban engine to stall?
Stumbling and poor idle can be caused by air or fuel starvation so make sure that those filters are OK. I think that my own problem is caused by dirt in the fuel tank plugging up the fuel intake screen. I think the dirt falls off when the engine is shut off.
Why does my Chevy truck stall at idle?
Filter is not that old, and if plugged or if pressure regulator is malfunctioning, why do I never see fuel pressure at throttle body so much as waver lower than 12psi? Also, many times the lean condition will start just off idle so bad so that truck wil fall flat on its face and stall.
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.
Why does my Chevy Suburban not start after 10 hours?
It’s possible that a mechanic might replace the fuel pump in the tank without cleaning out the fuel tank and fixing the problem. This doesn’t explain why the car won’t start after sitting 10 hours with less than a half tank of fuel and will start if the tank is banged on the bottom.
How long does it take for a GMC Sierra to stop stalling?
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 My 2002 with the 8.1 had a similar problem for a year for which the dealer or various independent repair facilities couldn’t find a solution.
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.
Can a Harley Davidson run at low speeds?
However, since I bought it the engine is not running well at low speeds. It basically runs fine under mild/strong acceleration or at full highway speed and seems to idle normally when the bike is started.
Why does my Chevy Silverado stall at low rpm?
Stalls out while driving at low rpm , changed alternator, battery and 2brand new fuel pumps and still stalls , getting worse, before temp gets up it seems to run A ok ???? Please help !! My silverado idles extremely rough and stalls out when i press on the gas i can sometimes keep it running but barely does anyone know what it could be
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 My 2002 with the 8.1 had a similar problem for a year for which the dealer or various independent repair facilities couldn’t find a solution.
Why does my car stall at high speed?
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. You may experience slow acceleration, acceleration surge at both high and low speeds, hesitation or delay in acceleration, and other related symptoms.
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.