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Old June 8th, 2009, 04:08 PM   #1
tmedley27
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Default backfiring 454

chevy 454 big block.any ideas why it backfires when you put it to the floor. otherwise runs good.
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Old June 8th, 2009, 04:23 PM   #2
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I think a discription of the back fire is in order?
if its intermtitent and iregular its most likely a fuel problem.
if it only does it cold its a plug problem
if its very fast burst of popping back through the carb or TBI its a cam problem
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