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1988 GMC Jimmy idle erratic in park

Tiny
GMCJIMMY
  • MEMBER
  • 1988 GMC JIMMY
  • V8
  • 4WD
  • AUTOMATIC
  • 166,200 MILES
Rescently had a new long block put in, the idle is searching at idle, my mechanic has put in a tps, iac and a new ecm, no change as of yet, my question is when he checked the iac he told me he had power on only 2 of the 4 wires, thats why he changed the ecm, can you point me in the right direction?
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Sunday, January 20th, 2008 AT 11:56 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Have him check the fuel pressure and the EGR system that checks out-look for exhaust restriction.

Did he clean out the throttle body/air bypass passages/throttle plate.
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Monday, January 21st, 2008 AT 1:23 AM

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