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Old 01-25-2008, 01:03 PM
talleyho talleyho is offline
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holley carb backfires threw carb

hello im Aaron.i have a red 77 nova with a 307 turbo fire rebuilt 1200 miles ago.when i bought the motor it seemed to run perfect!but while putting it in i had to take the carb of and distibuter.well i went threw more hell getting the thing timed right but i think i wfinnaly got it. but hears the deal it a holley 4160 single pumper 600cfm looks NEW and when you punch it in drive or park it coughs/or backfires fire threw the carb but usualy cough and dies down and then usually goes back to idle.i did the the idle mixture screw trick to check the power valves and there good.float level good.timing i 10 beforo vaccum is around 10 to 13 in park or 10 to 9 in drive.i already when threw a set of plugs because they were SOOTY BLACK.running rich sounds like.no black smoke threw exhaust but some WHITE>please help i been working on this car for 9 MONTHS.
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