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PKRWUD · 08-30-2005, 05:24 PM

Okay, I'll go out on a limb here and say you have a loose collector bolt. This will cause a slight exhaust leak, but when you back off the throttle suddenly, after punching it, it will create a small "backfire" because the sudden vacuum draws oxygen rich air into the red hot exhaust, and causes it to ignite. Very common problem when a header collector bolt is loose, or the gasket is damaged.

08-30-2005, 05:24 PM	#5
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Re: back firing problem! Okay, I'll go out on a limb here and say you have a loose collector bolt. This will cause a slight exhaust leak, but when you back off the throttle suddenly, after punching it, it will create a small "backfire" because the sudden vacuum draws oxygen rich air into the red hot exhaust, and causes it to ignite. Very common problem when a header collector bolt is loose, or the gasket is damaged. __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!