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Old 06-02-2019, 08:51 AM   #13
Purdy Swoft
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Join Date: May 2010
Location: Alabama
Posts: 7,215
Default Re: 31 coupe will not go over 40 mph

Running too rich and unburned gas collecting in the muffler . When the engine is shut down , the temperature in the muffler increases and if there is the slightest leak in the exhaust ,t the air from the exhaust leak sets of the explosion-backfire in the muffler
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