Q: Throttle body changed 3 days ago. Idle relearn performed and still high idle and revving while in park.

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Throttle body changed 3 days ago idle relearn performed and still high idle and revving while in park

My car has 109000 miles.
My car has an automatic transmission.

Hi there. Check the engine for a vacuum leak. Check all vacuum lines, hoses, and the intake for any leaks. Also check the brake booster for any leaks. A vacuum leak will increase the engine’s idle speed while the engine is not loaded. If you need further assistance with your engine revving in neutral and park, then seek out a professional, such as one from Your Mechanic, to help you.

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