Stalls when coming to stop restarts no problem running rough?

Tiny
ANDYC1
  • MEMBER
  • 1995 CHEVROLET SPARK
  • 150,000 MILES
Stalls when coming to stop restarts no problem running rough?
Wednesday, January 2nd, 2013 AT 7:50 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

This issue could be due to a dirty or malfunctioning idle air control valve (IAC).
The IAC controls the engine speed while idling. It allows a specific amount of air into the engine.

Over time dirt and debris can build up inside the IAC. Which will restrict air flow, which can impact the way the engine idles. Sometimes it will not idle at all, and you will have to apply the throttle to keep the engine running.

Cleaning the IAC many times can improve the drivability issue.
Here are a couple of helpful articles:

https://www.2carpros.com/articles/how-a-idle-air-control-valve-works
https://www.2carpros.com/articles/idle-air-control-valve-service

Clean out the IAC and let me know of any questions.
Thank you.
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Saturday, January 22nd, 2022 AT 10:07 PM

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