1992 GMC Sierra idles rough

1992 GMC SIERRA
300,000 MILES • V8 • 4WD • AUTOMATIC
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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
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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