92 GMC 4WD

  • Tiny
  • charlie1960
  • 1992 GMC Truck
  • V8
  • 4WD
  • automatic

I have a 1992 gmc 4wd with a 5.0 eng my problem is hard to start and it surges high an low when idling an when going down the road. I changed the throttle position sensor with no change any idear what it could be

Do you
have the same problem?
Sunday, June 5th, 2011 AT 4:57 PM

1 Reply

  • Tiny
  • rasmataz
  • Member

Check the fuel pressure with a gauge if its within specs-could be low, also clean out the idle air control valve and test the coolant temperature sensor-

Was this
Sunday, June 5th, 2011 AT 5:03 PM

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