sevice engine soon light

GMC
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CMS
  • MEMBER
  • 14 POSTS
91 chevy s10 blazer the ses light keeps coming on and off all the time had code checked it says idle air controle valve was bad
but it idles fine except for when im stopped i turn my wheel it the idliong changes and the vehicle vibrates please help
Feb 28, 2006 at 1:49 PM
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MVANNESSJR
  • ✓Experienced Mechanic
  • 223 POSTS
Replace the IAC then and your problem should go away.
Mar 1, 2006 at 1:15 AM
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Suggested Repair

Replace the idle air control (IAC) valve, which matches the stored code and the idle change when turning the wheel at a stop.

Conversation Summary

A 1991 Chevy S10 Blazer has a service engine soon light that comes on and off. A code check indicated a bad idle air control valve. Idle is otherwise fine, but it changes and the vehicle vibrates when the steering wheel is turned while stopped. The expert advised replacing the IAC valve to resolve the problem.

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