Skip the auto shop - Our mechanics make house calls

Q: Motor skips a beat only when idling.

asked by on

Hello!starts well drive for a while I stop at a red light when its idle the motor will skip a beat at least once.New battery new sparkplugs I have my oil changes regularly I alternate regular and high test gas the check engine light is not lit What could be the problem?

My car has 136000 miles.
My car has an automatic transmission.

A: Hello - most likely, the idle air control v...

Hello - most likely, the idle air control valve is a bit gummed up and is sticking ever so slightly when it becomes the key control at a stop light. Cleaning or replacing it should resolve the "stoplight stumble."

I would recommend having the idle control valve replaced by a certified mechanic, such as one from YourMechanic, who can come to your location to get your car back in working order.

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: Engine stumbling on a '98 Regal

No, it wouldn't be the speed sensor. That's just the old age and any minor thing can do that. On that particular vehicle, I'd advise doing my video "how to clean fuel injectors on your car" and if you're not...

Q: About to purchase a Range Rover 2010 TDV6 auto 4x4 MY10 with 74405kms. What costs am I looking at in the near future?

Hey there. The service costs on a vehicle like this can vary widely depending on the shop doing the work, especially on a vehicle like a Range Rover. As with any vehicle approaching 100,000kms, there will definitely be substantial maintenance...

Q: My car shows a P0420 code and the engine coolant temperature reading (via torque pro app and elm327 Bluetooth reader) stayed at 84.2 degrees

Hi there - "boundary measured engine temperature," or the lowest temp reading a sensor can transmit, can be different based on each temperature sensor. The issue here is what is the true engine temperature? Is the thermostat getting the engine...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...