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92 Buick 3.1liter

Tiny
TWOTONETOKEN
  • MEMBER
  • 1992 BUICK REGAL
  • 6 CYL
  • FWD
  • AUTOMATIC
Car cuts out, ******, bucks. Dies. Replaced fuel filter, ignition module, 3 coils, & the PCM. Mechanic said I didn't need to do "IDLE LEARN PROCEDURE" after replacing coils. "A few drive cycles should reset it." It didn't. So I replaced the brain. Now it runs great when it's cold, but as soon as it starts to warm up, It goes haywire and won't stay running. It finally sent a code 35. (Idle speed control circuit). Will the idle learn procedure cure this? Or, should I get a new idle air control valve? Any advise would be appreciated.
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Monday, June 6th, 2011 AT 6:01 PM

3 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Does it only act-up at idle? If so, clean the idle air system. I haven't checked out the code 35, yet.
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Monday, June 6th, 2011 AT 6:14 PM
Tiny
TWOTONETOKEN
  • MEMBER
  • 2 POSTS
Acts-up at all speeds.
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Monday, June 6th, 2011 AT 6:31 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
In my opinion, if it acts up at highway speed. The iac should have nothing to do with it, Once you open the throttle, the iac is bypassed. Clean the iac anyway, won't hurt anything. Maybe it will help idle?

Check the coolant temp sensor, if problem is temp related.
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Monday, June 6th, 2011 AT 6:45 PM

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