What causes excessive engine rev?

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Answer

Driving in low gears. Pushing hard on the accelerator ("flooring it"). Going uphill. Driving with excessive weight (like a trailer).

Either shift up or lay off the gas to bring your engine speed down.

Answer

This is a classic symptom of a "worn clutch" in a manual transmission vehicles. The friction disc cannot transfer power under load so it slips under load causing excessive engine reving.

Answer

Excessive engine RPM at idle can be caused by a vacuum leak or by a stuck Idle Air Control (IAC) valve.

First answer by ID0083230222. Last edit by Cmbroth. Contributor trust: 276 [recommend contributor]. Question popularity: 145 [recommend question]

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