High idle in park

Tiny
EBILLINGS17
  • MEMBER
  • 2002 OLDSMOBILE SILHOUETTE
  • 2.4L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 234,444 MILES
We changed the idle air control valve. We did a oil change and plugs and wires replaced. Engine idling high in park. What could be the issue?
Thursday, August 23rd, 2018 AT 7:10 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

Did you clean out the passages real good from all carbon when you replaced the IAC?

Are all the vacuum lines attached?? look for any loose or broken lines.

Throttle body having carbon deposits can also cause this as well. Clean it with a cleaner and a tooth brush to remove all the build up.

Is the check engine light on?

Roy

https://www.2carpros.com/articles/throttle-actuator-service

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
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Friday, August 24th, 2018 AT 4:24 AM

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