Skip the auto shop - Our mechanics make house calls

Q: How to find and stop cause of engine vibration?

asked by on

engine vibrates- worse with a/c on. You can feel it in the drivers seat. engine and manifold mounts have been checked and some sort of rotor cleaned out, but didn't fix. engine light has not come on so it hasn't been diagnosed.

My car has 50000 miles.
My car has an automatic transmission.

A: Usually engine vibration is due to a misfir...

Usually engine vibration is due to a misfiring cylinder, and a Check Engine Light will be usually be triggered. It may be possible that the vibration is caused by a low idle speed and by turning on the AC, it adds a load to the vehicle and idles even lower. Cleaning the throttle plate and possibly the idle air control valve, may help with your concern. I would suggest using a quality fuel additive to clean the injectors and fuel system as a first step. If you’re unable to fix the issue, then I suggest having a certified technician, like one from YourMechanic, determine the exact cause of your shaking concern. Good luck.

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: Ac not blowing cold air

An AC system that blows warm could have several faults. The first and most suspected is a low system charge. If the system is low, then there is most likely a leak somewhere and recharging only prolongs the inevitable: the...

Q: My engine has a ticking knocking type of sound. It runs fine not buring oil or losing coolent. Sounds like the valves taping

On a 1998 engine with 147,000 miles, the noise could come from anywhere. I typically check the engine oil level when cool to verify it is correct. Then, I run the engine for 5 minutes, shut it off, and check...

Q: Car engine replacement

The 2002 and 2003 Camry and Solara, at least, used that engine. Inasmuch as engines are computer controlled, replacements have to be absolutely EXACT, otherwise the engine may not even start because the engine sensor interface with the existing PCM...

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 Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...