1992 GMC Sierra idles rough

1992 GMC SIERRA
300,000 MILES • V8 • 4WD • AUTOMATIC
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TESANATOR
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  • 1 POST
i changed plugs plug wires cap rotor map sensor egr but runs the same when reved and held there sounds good but idles as if it has a miss.
Nov 16, 2008 at 9:28 PM
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LEGITIMATE007
  • ✓ASE Certified Mechanic
  • 5,121 POSTS
  • ASE Certified Mechanic
I would check the idle air control valve and replace if necessary,check map sensor too,for good measure
Nov 16, 2008 at 9:47 PM
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