Backfiring

Asked by GuruTVM5J Jun 22, 2018 at 01:42 PM about the 1971 GMC C/K 1500 Series

Question type: Maintenance & Repair

I just replaced the carb (edlebrock quadrajet) and
distributor, I think the timing is fine because I idle
good at 10TBC  and in gear at 6TBC but when I
drive I back fire

1 Answer
65,590

firebird338 answered 6 years ago

Sounds like you may have a crossed spark plug wire or miss firing plug. Check firing order for your vehicle.

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