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Tim West
Tim West, ASE Certified Technician
Category: Car
Satisfied Customers: 4638
Experience:  ASE Certified Service Manager for Bridgstone/ Firestone
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park or neutral my engine is reving without touching the gas pedal

Resolved Question:

when i put my car in park or neutral my engine is reving without touching the gas pedal
Submitted: 8 years ago.
Category: Car
Expert:  Tim West replied 8 years ago.
1. Disconnect the Dark Green/Black and the Dark Blue/Yellow wires from the Automatic idle air control. With a 9 volt battery and a couple of jumpers, try powering and grounding the terminals, should be able to run the idle up and down.

2. If not, replace the IAC

3. If it works, check the throttle cable, the idle stop screw and the throttle blade.
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