1992 GMC Sierra idles rough

1992 GMC SIERRA

300,000 MILES • V8 • 4WD • AUTOMATIC

TESANATOR

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

LEGITIMATE007

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