Skip the auto shop - Our mechanics make house calls

Q: Car vibrating/shaking when idling

asked by on

Sometimes, when I'm sitting/idling, say, at a traffic light, my car shakes/vibrates; I can really feel it in my steering wheel but it seems to be the whole car. Turning the a/c off seems to make it better. If I put it in Neutral while at the light, the vibrating stops or lessens so that's what I've been doing when it happens. Otherwise, the car is in good shape; I do regular maintenance and I'm pretty easy on cars, in general. Any help will be much appreciated. Thanks, Shelly

My car has 37700 miles.
My car has an automatic transmission.

A: This may be related to an idle air control ...

This may be related to an idle air control valve or potentially low fuel pressure. The idle air control valve monitors air intake as it is mixed with fuel prior to being injected into the motor. When this is not working properly or sending inaccurate signals to the ECU, this may cause an improper amount of air and fuel to be supplied at idle. This will be worse when the AC is on as the AC requires more power from the engine to operate resulting in more of a strain on the engine. I would recommend having an expert from YourMechanic come to your location to take a look at the vehicle to determine what may be causing this shaking/vibrations.

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

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: Transmission not shifting

Hi There, It sounds like you may have a faulty transmission speed sensor that may be causing this to happen. The other possibility may be a clogged transmission fluid filter that could also be limiting the flow of the transmission...

Q: no power only just goes

The jerking may be related to what is called a mass air flow sensor which is a unit that regulates air flow into the intake as it is mixed with fuel prior to being injected into the motor. When this...

Q: After you sit with the car running, the car starts smoking and eventually starts shaking

Hi, thanks for writing in. It all depends where the smoke is coming from. If it is from the exhaust then your engine be running rich and starting to foul out the spark plugs. Have the computer tested to see...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...