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Home >> Pontiac >> 2003 >> Vibe Base, FWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Trouble Shooting - No Codes >> Symptom Diagnosis >> Backfire >> Definition
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Symptom Diagnosis: Backfire: Definition

The fuel ignites in the intake manifold, or in the exhaust system, making a loud popping noise.

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