backfiring on decel

Discussion in 'TFI Settings' started by harleyguy0983, May 1, 2011.

  1. harleyguy0983

    harleyguy0983 New Member

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    i just bought a 2000 roadking fuel injected and it has a dobeck tfi module on it. i have notice when i am riding when i come up to a stop sign from 55mph and down shift it keeps back firing through the exhaust. it has a sreaming eagle stage 1 air cleaner and just a rush exhaust mufflers. not sure what to do to get it to stop back firing. any suggestions would be greatly apprectiated thanks Jeremy
     
  2. JBC2565

    JBC2565 Junior Member

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  3. ultra...good

    ultra...good Banned

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    You are too lean on the low end and or you have an exhaust leak if it does that.
     
  4. Dr. Dolittle

    Dr. Dolittle Experienced Member Staff Member Moderator Contributor

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    You'd probably get better results by calling Dobeck customer service and let them walk you through which TFI you have and their suggested settings for your bike. Or if you know which model TFI you have, their website has recommended settings for your bike.
     
  5. HarryB737

    HarryB737 Junior Member

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    If you have the larger Rush baffles, 2.25" you may not get all the back firing out. Rush mufflers are a Flow through design w/Glass packed baffles. What it sounds like you are experiencing is a lack of back pressure on the engine. Proper back pressure is a good thing for proper engine performance and balanced tuning.
     
  6. glider

    glider Veteran Member

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    Most any low restriction muffler will give you decel popping. It's very few that don't.