Skip the auto shop - Our mechanics make house calls

Q: my car is not idling and wants to stall while stationary or moving slow after it gets warm.

asked by on

When I am driving my jeap after it warms up say over 75 miles of continuous driving it does not idle and wants to stall when you come to a stop. But when you are driving continually and not stopping no issues.

My car has 126000 miles.
My car has an automatic transmission.

A: It sounds like you may have a dirty or fail...

It sounds like you may have a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. This valve is controlled by the vehicle’s computer which will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed. When the engine RPM drops below the normal range of 750-800 RPM, this often times will cause the engine to stall indicating a dirty or faulty idle air control valve. I would recommend having an expert from YourMechanic come to your location to diagnose and repair your idle air control valve.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: how much should an ignition coil or ignition cost w parts and labor for a 1988 olsmobile 98 regency engine is a 3.8

Hi there: If the quote you were given includes replacing both the ignition coil and module, then a price between $200 and $300 is a pretty fair estimate. If it's one or the other, then a quote closer to $200...

Q: Jeep won't start, have a p0523 code

Diagnostic trouble code P0523 signifies that there is trouble with the oil pressure sensor circuit or an actual excursion, to the high side, in oil pressure. A "high" reading is being recorded by the PCM due to either electrical or...

Q: Truck stalls at stops. Will start and idle .

Hello. Stalling can be caused by many things. If you've been advised that 2 of the injectors are dumping excessive fuel into the engine then I would recommend replacing them. If excessive fuel is fed to the engine it will...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.