This Kia Rio had a severe engine vibration, see the picture below for the cause.

© DenLorsTools.com Summary: Suggestions of what to check when a car has excessive drivetrain vibrations. There are several things that can cause an engine to shake. If there is an engine vibration problem, typically it gets worse with the air conditioning turned on since there is more of a load on the engine. In this auto repair article, we will cover several things that can be looked at to help diagnose the problem.

Misfires can definitely cause an engine to shake, usually in most late model cars a misfire will almost always be accompanied by a CEL (Check Engine Light) and misfire code. Many times if the engine also stalls, there could be excess carbon build up on the throttle plates or IAC (idle air control motor). Cleaning the throttle body and IAC is a common practice when trying to eliminate possible causes of engines vibrating.

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