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Old 08-17-2009, 02:23 PM   #2
BP68
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Join Date: Jun 2006
Location: Olive Branch, MS
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Re: HEI Swap with backfiring through the carb

Sounds like you are 180 out. May have been a tooth off before when it popped thru exhaust.

You should pull number one plug and put a finger over the hole and while engine spins over till you feel it puff on compression stroke.
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