rev up and down in park

Asked by Mar 20, 2012 at 01:18 PM about the 1998 Honda Civic EX

Question type: Maintenance & Repair

When I put it in park after driving it it revs up 2000 psi's and down and up Do you know what causes this?

6 Answers

1,095

idle air control valve should be on the back of your intake manifold with 2 wires going to it and 2 coolant lines.

3 out of 3 people think this is helpful.

Thank you Takoda!!! Most helpfull!

1,095

no problem

1,555

same thing happened to me... either a bad IAC or a dirty intake manifold...or probably a vaccum issue?

1 out of 1 people think this is helpful.

Thank you Anthony! I will check both!

does this make your valves to burn up. i have the same problem when in neutral at a stop it rev's up and down. and i have a valve tapping but my oil level is fine.

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