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.

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. How to find and stop cause of engine vibration?

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: What would cause my vehicle to misfire in all 4 cylinders and throw two codes for air/fuel ratio heater circuit malfunctions?

One of the codes (P0115) refers to the coolant temperature switch circuit. If the circuit has a fault, you may be getting a false indication of the actual, and perhaps too high, engine operating temperature. The cooling system is pressurized...

Q: Nissan Altima 2.5 now stalls when put in gear. Could it be gas n dirty plugs related?

Hi There, This may be a sign of a faulty MAP sensor as the vehicle responds adversely to a load put on the motor (i.e. putting it in gear, turning on AC or engaging the brakes). The Manifold Absolute Pressure...

Q: Vehicle stalls when I drive over bumps

When an engine stalls, it is usually due to lack of one or two things: Either the ignition system temporarily quit working properly, or the fuel system temporarily quit working properly. It is also possible that you may have an...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.