Causes and fixes for a car that shakes when idling but smooths out and stops shaking while driving.
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Possible Causes of the Shaking:
Bad Motor Mount
Bad Transmission Mount
Engine Malfunction

How to Find the Cause of the Shaking:
Examine the motor mounts and transmission mounts.
Use and OBDII scan tool to read for any error codes.


Possible Engine Problems that can Cause Shaking"
Dirty throttle Body
Bad MAF Sensor
Bad coil pack, spark pug wire, or spark plug.
Engine misfire
Vacuum leak
Timing Off
Idle Control Valve
Engine combustion issues, like timing or fuel delivery

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