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Old 01-30-2009, 12:28 AM   #1
1974blazer
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Join Date: Jan 2009
Location: Tucson, Az
Posts: 15
backfire from passenger side

i have a 1974 blazer, for some reason my passenger side pops, i have replaced spark plugs and cables, changed fuel filter, i cleaned out the carb, and it still does the same thing, could it be timing? it never did this before, i upped the timing from 8tdc to 11tdc, i have an edelbrock 650cfm performer, performer intake, umm any other questions you can ask to try to help me out

thanks
Robert
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