2008 twincam backfire
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Stage I
Joined: Aug 2012
Posts: 1
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From: Jacksonville FL
2008 twincam backfire
I changed the cams out to T555 (from Tmans Performance), installed adjustable P/rods and a stage one breather. I'm trying to dyno tune it but have continuous back firing even with dumping more and more fuel to it. is probable cause an intake air leak? I didn't do anything to the intake or throttle body other than change the airfilter and backing plate. The back firing occurs at high RPM. Any assistance is greatly appreciated.
Last edited by jackal65; Aug 15, 2012 at 08:34 AM.
Seasoned HDF Member
Joined: Jul 2008
Posts: 9,282
Likes: 1,139
From: southeast PA
Not enough info. What kind of exhaust and tuner do you have? It could be an intake or exhaust leak depending on what your setup is. If you don't have any leaks it's your map. Should be able to tune that out as long as you don't have any mechanical causes for the backfire.
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