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carburetor backfire

  1. 390 Fe trouble starting, Backfire through carb

    Engine
    I just swapped a 390 into my 74 gran torino, I got it running and driving but the engine wasn't running the best. I parked the car this morning to try and mess around with the engine timing. I didn't do anything major to it before it kept backfiring through the carb when cranking and wouldn't...
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