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Where is the idle air control valve (IAC) located?

Tiny
MRMOORE1985
  • MEMBER
  • 1996 CHEVROLET MONTE CARLO
  • 3.4L
  • V6
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
IAC valve location needed. It's the 3.4L engine (z34).
Friday, February 5th, 2021 AT 11:13 AM

6 Replies

Tiny
STEVE W.
  • MECHANIC
  • 13,572 POSTS
It is mounted on the side of the throttle body next to the throttle position sensor.
If you are replacing it you will want to measure how far out the pintle is. It should be no farther than 28 mm. I normally compress them a bit and let the system reset the distance after the passages are cleaned.
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Friday, February 5th, 2021 AT 2:08 PM
Tiny
MRMOORE1985
  • MEMBER
  • 3 POSTS
On top, in this case. My TPS is on the bottom, so that was it.
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Friday, February 5th, 2021 AT 2:20 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,572 POSTS
What is the issue you are having with it?
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Friday, February 5th, 2021 AT 2:40 PM
Tiny
MRMOORE1985
  • MEMBER
  • 3 POSTS
Usual symptoms. Rough idle, SES light, etc.
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Friday, February 5th, 2021 AT 2:46 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,572 POSTS
What are the codes?
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Friday, February 5th, 2021 AT 2:48 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Here is a guide to help you get the codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back.
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Thursday, March 4th, 2021 AT 9:47 AM

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