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Home >> Isuzu >> 1990 >> Impulse Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/O Codes - EFI >> Symptom Diagnosis >> Backfire

Symptom Diagnosis: Backfire

Check ignition timing.
Check ignition coil output.
Check for faulty spark plugs.
Check EGR System.
Check for crossfire between spark plugs.
Check for correct valve timing.

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