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1993 Pontiac Bonneville High Idle

Tiny
LECOOLJ
  • MEMBER
  • 1993 PONTIAC BONNEVILLE
Engine problem
1993 Pontiac Bonneville V6 Front Wheel Drive Automatic 145000 miles

My ca has been parked for almost one year; I started it up to see if it would run. When it first started, the engine will race at 3000rpm; however if I put it in drive it would come down to about 1000rpm. I let it sit and run for a while but it still idles high - 3000rpm.
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Sunday, December 9th, 2007 AT 1:26 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Have the idle air control valve tested and clean out the throttle body/plate, also the throttle position sensor.
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Sunday, December 9th, 2007 AT 1:33 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
I would try replacing the IAC valve and cleaning the ports and throttle body itself. These guides will help and I have included the IAC location in the images below.

https://www.2carpros.com/articles/engine-idles-too-high

and

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

Check out the images (below). Let us know what you find.

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Monday, August 5th, 2024 AT 12:03 PM

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