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.

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: How do I remove a headrest?

All of headrests can be removed. To do so, first lift the headrest up to its highest position. Then press and hold the Release button on the headrest support while pulling the headrest up until it is removed. Tip Always...

Q: My car has only misfired twice but idles perfectly. The Check Engine Light is also on - 2012 Buick Regal

Hi there. From the description you have provided, concerning your vehicle's Check Engine Light and two misfires, it is advisable that you get a second opinion. A timing chain problem would cause your vehicle to have a consistent drivability issue....

Q: What is code p0025?

Hi there, Code p0025 indicates a problem with the camshaft position sensor on bank 2 reading a over-retarded condition. It indicates that there is a problem with the variable valve timing system (VANOS) and needs to be diagnosed by a...

Related articles

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...
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.