Skip the auto shop - Our mechanics make house calls

Q: I have an engine vibration that starts when I am in idle.

asked by on

The engine vibration is most noticeable when in idle and in drive though it is still present when in neutral. Mechanical loads like the AC seemed to be making it worse but I noticed that with the AC off, though the vibration was lessened that other things would cause the vibration to get worse, like electrical loads. Turn on the headlights, run the windshield wipers, even using the power windows would cause the vibration to get as bad as when the AC was on. Once driving and reaching 1000 rpm or so the engine vibration either stopped or was no longer noticeable and the car drives fine. This first started after going to a Jiffy Lube and getting the oil changed and tires rotated and also getting the air filter replaced. The Mazda dealer checked the car out for vacuum leaks and found none and was not able to determine what the problem was. I replaced all 5 motor mounts because 3 were worn but that didn't make any difference. Two other service shops have failed to find the problem. Options?

My car has 87000 miles.
My car has an automatic transmission.

The engine vibration will need to be checked to see if it is worse in drive than it is in reverse. If the vibration is less apparent in reverse, then the motor mounts will need to be neutralized to center the motor mounts. If the vibration is even when the engine is in neutral, then the engine crankshaft damper is bad and causing the engine vibration. I recommend having a certified mechanic, such as one from YourMechanic, check to see if the motor mounts or the engine damper is at fault. They will be able to diagnose your engine vibration and ensure that the correct repairs are made on your vehicle.

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!
  1. Home
  2. Questions
  3. I have an engine vibration that starts when I am in idle.

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: Issue with power steering

Hello. The leak is what needs to be identified and repaired. If the fluid is coming out, then the vehicle will not have any power assist. Most of the time, a serious leak like this comes from one of the...

Q: EPC Light

Hello, thanks for writing in about your Volkswagen Jetta. This is a common issue when the mass air flow sensor is failing or the throttle position sensor is faulty. This will cause the intermittent hesitation and spikes in RPM's as...

Q: Car lost power after being serviced

There is a recall for this problem of no power, and it may fix the the issue by increasing the oil flow during startup and changes to engine ignition timing to increase power. When the car was serviced, they may...

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...
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...
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...