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1993 GMC C1500 idle air control

Tiny
MARCUS1221
  • MEMBER
  • 1993 GMC C1500
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 78,000 MILES
Changed out the idle air control and tps still having idle problems especially in the morning when starting up have to step on the accelerator never had to do that.
Tuesday, November 18th, 2014 AT 7:01 PM

1 Reply

Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Have you tried cleaning out the throttle body on both sides of the throttle plate? I would take a fuel pressure reading to be sure the spider junction isn't leaking at one of the valves.
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Wednesday, November 19th, 2014 AT 6:29 AM

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