1992 Z-34 Lumina

Tiny
T-MAIN
  • MEMBER
  • 1992 ALL OTHER MAKES ALL OTHER MODELS
This car has a 3.4 and runs awesome in summer. 2 years ago it started to rev high in the winter time. The car has a govner on it so at least it doesn't rev over 28oo RPM. It takes abou 10 min. Before it will sttle down and idol great. Now it is getting worse and will not idol under 2000 RPM even after warm. I have changed all ! Sensors plus computer when it went bad. Catalytic Converter is also new. I was told once to get an O2 bypass but that is only for 1996 and newer. Hope someone can help, this has been driving me crazy now for 2 years with no great outcome. I need it fixed before it blows up.
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Tuesday, February 13th, 2007 AT 5:44 PM

4 Replies

Tiny
CHEVYII
  • MEMBER
Have you checked or replaced the idle air control motor yet, (iac) this could cause the problem you are descibing

thanks
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Monday, February 19th, 2007 AT 11:27 AM
Tiny
T-MAIN
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I just changed the idle sencor and it still revs high but not as bad. Any other ideas?
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Monday, February 19th, 2007 AT 7:04 PM
Tiny
CHEVYII
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You can check the injector see if it looks like its dumping fuel into the throttle body
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Monday, February 19th, 2007 AT 7:14 PM
Tiny
JACK42
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Triple check for vacuum leaks. Did you replace the coolant sensor?
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Tuesday, February 20th, 2007 AT 7:48 AM

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