Skip the auto shop - Our mechanics make house calls

Q: When i start car in the morning, it vibrates with a rattling noise under

asked by on

When i start the car in the morning or when the car has been sitting for while there is vibrating. noise especiallywhen you engage in gear

My car has 152000 miles.
My car has an automatic transmission.

A: Hey there. This sounds like you may have a ...

Hey there. This sounds like you may have a rough idling problem that tends to get worse once the car is put into gear. This can happen for a variety of reasons such as low fuel pressure, faulty fuel injectors or a dirty or failing idle air control valve.

Low fuel pressure will cause the fuel injection system to provide less than the required amount of fuel needed for the car to run smoothly. This may also be true when you have dirty or malfunctioning fuel injectors.

The idle air control valve monitors 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 with the help of the idle air control valve.

If you would like to have this all checked, I recommend having a certified technician from YourMechanic can come to your home or office to diagnose the vibration issue and advise you on needed repairs.

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: When you change the front wheel bearings on a 2004 wv Touareg , what else needs to be done

Hi there: Sometimes mechanics get a diagnosis incorrect. It's possible that the wheel bearings were faulty; but not the source of the noise you're hearing. It's also very common for some inexperienced mechanics to improperly clean the center hub and...

Q: I20 making rattling noise could it be the faulty steering rack or the brake callipers

Hello. It is impossible to identify a rattling noise without pinpointing the location in which it is coming from. The brakes typically do not make a rattling noise. Usually the brakes make a grinding noise of some kind. The steering...

Q: 92 Ford Ranger vibrates when going down the road at 60-65 mph

If it got that after you did the tires it could be that they didn't balance them right. I had a big peeve happen to me about six months ago. I got new tires for my wife at a NTW...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.