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Old 08-02-2011, 08:07 PM
Twix27 Twix27 is offline
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Default chevy 350 backfire
I just bought a 70 c10 and i've been trying to fix the backfiring problem. When i'm in drive it doesn't backfire but when i'm in low2 or low1 and i let off of the gas it backfires VERY bad sounds like a gunshot and its a bit embarrassing. Thanks for the help
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Old 08-03-2011, 09:15 AM
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I just bought a 70 c10 and i've been trying to fix the backfiring problem. When i'm in drive it doesn't backfire but when i'm in low2 or low1 and i let off of the gas it backfires VERY bad sounds like a gunshot and its a bit embarrassing. Thanks for the help
Is the backfire through the carb or exhaust?
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Old 08-03-2011, 06:01 PM
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the exhaust
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Old 08-03-2011, 07:00 PM
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My guess is a timing issue. Without knowing what cam or other stuff you have I wouldn't know where to start as a baseline. Maybe one of the guys here whos better at that could chime in?
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Old 08-04-2011, 10:08 AM
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its just a stock 350 with a 4 barrel holley stock heads, stock cam, everything is stock but headers
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Old 08-04-2011, 02:11 PM
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What do you have the timing set at?
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Old 08-05-2011, 03:18 PM
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its at about 750 to 800
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Old 08-05-2011, 06:32 PM
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its at about 750 to 800
That is the idle RPM. Do you have a timing light?
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Old 08-06-2011, 11:06 PM
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no i do not i can go rent one though what would you recommend the timing at
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Old 08-07-2011, 04:20 AM
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no i do not i can go rent one though what would you recommend the timing at
10* btdc would be a good start.
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