Mike's Workshop Manuals: Service manuals for every vehicle
Home >> GMC >> 2003 >> Jimmy 2D Utility, Part Time, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Trouble Shooting - No Codes - 4.3L >> Symptoms >> Engine Backfires >> Symptom Definition

Symptom Definition

Fuel ignites within intake manifold or in exhaust system, making a loud popping noise.