Backfire While Up-shifting
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Cruiser
Joined: Sep 2011
Posts: 196
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From: South Carolina
You're right, it is more of a back fire on throttle roll off. Changes include Big Sucker A/C, Fullsac header, Rinehart 4" mufflers, TTS module.
Outstanding HDF Member
Joined: Nov 2008
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Sounds like you might have an exhaust leak at the headpipe. Slip a 13 mm socket on a 4" extension and see if maybe you can't tighten it up a bit. There are two nuts on each headpipe. They have a compression gasket in there so don't stand on it, just snug it up till it quits popping. You also might have a loose muffler clamp on one of your mufflers.
Thread Starter
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Cruiser
Joined: Sep 2011
Posts: 196
Likes: 0
From: South Carolina
Sounds like you might have an exhaust leak at the headpipe. Slip a 13 mm socket on a 4" extension and see if maybe you can't tighten it up a bit. There are two nuts on each headpipe. They have a compression gasket in there so don't stand on it, just snug it up till it quits popping. You also might have a loose muffler clamp on one of your mufflers.
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Ultimate HDF Member
Joined: Sep 2006
Posts: 5,535
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From: Salem, Va.
Had the same problem with my TTS tune. What I did was go into the Map you are running and back off the Deceleration and Acceleration enrichment a little. Took care of the problem.
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Outstanding HDF Member
Joined: May 2008
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From: Ashland Ohio
What TTS cal are you running? I, too would play with decel enleamnment.. AE adjustments won't do much to help.
What RPM does this do this? Wind it up over 4k RPMs and let it coast down. When do you get that crack? If this can be narrowed down a bit, you could play with the Closed Spark settings and suck that crack back into the head a bit. Need more info.
What RPM does this do this? Wind it up over 4k RPMs and let it coast down. When do you get that crack? If this can be narrowed down a bit, you could play with the Closed Spark settings and suck that crack back into the head a bit. Need more info.
Last edited by wurk_truk; Jul 15, 2013 at 10:19 AM.
