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Old 06-02-2019, 07:34 AM   #12
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Join Date: Jun 2014
Location: Westlake, ohio
Posts: 100
Default Re: 31 coupe will not go over 40 mph

I believe the backfiring is when you turn off the engine. I think the timing may be off a bit. Backfire means you have unburied fuels hen you shut down. You could be running s bit rich and need to lean out the carb settings.
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