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What Causes Intermittent Shaking When Idling in Park?

1 Answers

SanCassandra

07/29/25 2:34pm

Intermittent shaking when idling in park can be caused by: 1. Severe engine carbon buildup - Common causes of vehicle shaking include excessively dirty throttle bodies or clogged fuel injectors; 2. Ignition system issues - Check the condition of spark plugs, high-voltage wires, and ignition coils. Poor ignition system performance or weak spark plug firing can also cause such symptoms; 3. Unstable fuel pressure - If you've already cleaned engine carbon deposits, serviced the throttle body, replaced gaskets and spark plugs but still experience shaking at idle, it's recommended to visit a 4S shop to check fuel supply pressure and intake pressure sensors. Abnormal fuel pump pressure or faulty intake pressure sensor readings can both cause vehicle shaking.

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