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WHERE IS THE IDLE AIR CONTROL VALVE?

Tiny
EDWARDG30
  • MEMBER
  • 2002 CHEVROLET MONTE CARLO
  • 138,453 MILES
Car idles too high when coming to stop. The rpm is stuck on 1 1/2 it wants to overheat but I keep enough coolant in it so it doesn't. What could be the problem.
Wednesday, March 14th, 2012 AT 3:49 PM

6 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
The IAC is attached to the throttle body. Here is a guide that will walk you through the repair with diagrams below to show you on your car.

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, March 14th, 2012 AT 3:56 PM
Tiny
DJNJEFFCITY
  • MEMBER
  • 3 POSTS
  • 1996 CHEVROLET MONTE CARLO
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 178,000 MILES
My daughter's car has trouble staying running in cold temperatures. It starts but if she takes her foot off the gas, it dies. Once it is running, it runs fine.

Our mechanic said it could be that the idle valve or something is sticking in the cold weather. Is that something I can buy at an auto zone and replace myself?

How?

Thanks
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Tuesday, July 16th, 2019 AT 1:50 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Yes you can change the IAC valve yourself, and it is able to be boughten at autopart stores all over the place.

To change it unhook the electrical connectors and unscrew it. Be sure to clean the gasket mating surfaces and use a new one when reinstalling the IAC.

Also I think you should change the coolant temperature sensor before the IAC module, does it idle fine when warm?
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Tuesday, July 16th, 2019 AT 1:50 PM (Merged)
Tiny
DJNJEFFCITY
  • MEMBER
  • 3 POSTS
Yes, it does idle fine when warm. Thanks for responding so quickly!
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Tuesday, July 16th, 2019 AT 1:50 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Since its fine when warm I think you should replace the engine coolant temperature sensor first and go from there.
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Tuesday, July 16th, 2019 AT 1:50 PM (Merged)
Tiny
DJNJEFFCITY
  • MEMBER
  • 3 POSTS
Thanks, I will try that first.
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Tuesday, July 16th, 2019 AT 1:50 PM (Merged)

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