1997 GMC Sierra at start up engine revs uncontrollably

1997 GMC SIERRA
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BENSIKES
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Engine Performance problem
1997 GMC Sierra V8 Four Wheel Drive Automatic

had problem previously. replaced tps. this time replaced tps and iac modules. did not fix problem. scan tool shows no codes.
Feb 3, 2009 at 11:04 PM
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BLUELIGHTNIN6
  • ✓Experienced Mechanic
  • 16,542 POSTS
Hello
Thanks for the donation.

Suspect a vacuum leak. Inspect vacuum hoses under hood for any damage/cracks/loose fittings. Let me know what you find and I will follow up.



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Feb 4, 2009 at 1:58 PM
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