Skip the auto shop - Our mechanics make house calls

Q: The car stalls at low RPMs and during idling

asked by on

My car has starting problems. When it finally starts, it stalls. I've got the battery replaced but the stalling continues. It occurs at low RPMs during idling. It runs a bit better after tuning it up. But, it still idles poorly and stalls at stop lights. I checked the alternator by disconnecting the battery. It runs well that way so the alternator is not an issue. What could be the problem?

A: A sticking or stuck idle air control valve ...

A sticking or stuck idle air control valve can cause this condition. The valve needs to be removed and inspected for excessive carbon buildup. The valve could be cleaned and then then re-installed to see if proper operation can be restored, but these valves are inexpensive and generally just replaced. Fault codes should also be read out to see if there are any other possible issues as well. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the tools and training to correct your stalling issue.

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・Save up to 30%

Get a quote

What others are asking

Q: Car stalled out unexpectedly

Hello. This could happen for several reasons. Your car could have gone into a temporary limp mode because of transmission malfunction or because the battery and/or alternator has low voltage causing the car to stall. This problem should be addressed...

Q: On the highway it increases acceleration.

It sounds like your engine's idle speed is way too high. It is possible that your throttle cable may have gotten stuck on something that is causing it to pull the throttle slightly at all times. It is also possible...

Q: Car won't pass smog.

Hello! I will be happy to assist you. On your particular vehicle, random misfires are commonly caused by things such as low fuel pressure, a faulty oxygen sensor, bad vacuum lines, or faulty air flow sensors; a broken or loose...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.