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1992 GMC Truck idleing

1992 GMC TRUCK
140,000 MILES • V8 • 4WD • AUTOMATIC
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XXXTAT2GUYXXX
  • MEMBER
  • 1 POST
454 eng.

i have a gmc k3500 dually.all of a sudden it idles up and down,up and down non stop fast and i lose power.it doesn't stall but sounds like it wants too
Oct 4, 2009 at 12:38 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Clean out the idle air control valve and test the TPS and MAP sensors to include a fuel pressure check
Oct 4, 2009 at 12:51 PM
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