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Old 02-04-2005, 12:33 AM
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back fire

I just installed a new holley fuel pump in my Mustang with a 289 and a edelbrock 650 cfm 4 barrel carb. when I get on the gas the engine is back firing through the exhaust. Is the fuel pump not providing enough fuel or to little.....? It only does this when I get on it hard.....
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