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Engine sometimes races to 3000 RPM a few minutes after starting.

Tiny
DAVE KENNEY
  • MEMBER
  • 1993 PONTIAC BONNEVILLE
  • 120,000 MILES
Pulling over and stopping and restarting the car immediately fixes the problem. It does not happen all the time and only when the engine is cold. It never happens when the car is at the repair shop.
Saturday, November 19th, 2011 AT 3:26 PM

2 Replies

Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
It soundslike Idle Air Control Valve or a vacuum leak.
I am giving you a diagnostic walk through that will help you go through the car and find and fix common over rev issues.
It tells you how the IDLE AIR CONTROL works as well and how to check it.
You can find the IACV on the intake manifold near the throttle body.
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Saturday, November 19th, 2011 AT 3:59 PM
Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
I forgot to give you the link.

https://www.2carpros.com/articles/engine-idles-too-high
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Saturday, November 19th, 2011 AT 4:00 PM

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