Decel Popping

Discussion in 'Softail Models' started by ksheritage, Jun 26, 2011.

  1. ksheritage

    ksheritage Member

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    I just had V&H big shot staggered pipes, a heavy breather, and SE255 cams added to my 2007 Heritage. The dealership that installed dynoed the bike and I picked it up yesterday. Everything sounds great and the performance is much better than stock, but the bike not has a loud decel pop when downshifting. Is this normal or should the dealership remap the bike again? What causes the decel popping? Thanks.
     
  2. HDDon

    HDDon Experienced Member Contributor Retired Moderators

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    If this is happening below 2500RPM you may have an intake leak. Check Self help section Diagnostic and fuel injection line #26.
     
  3. Bodeen

    Bodeen Well-Known Member Staff Member Moderator Contributor

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    HDDON is right on. Also check the exhaust connections and make sure they are tight, from the heads out.

    Bodeen
     
  4. Iceman24

    Iceman24 Well-Known Member

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    Mine was a loose exhaust endcap (of all things). Easy way to check is run bike, cover exhaust ends (hands w/thick leather cloves worked for me) and you should be able to pretty much stall the bike...if not, listen for leaks (hiss). Good luck!
     
  5. 90FXRS

    90FXRS Junior Member Contributor

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    What type of fuel management system are you using?
     
  6. ksheritage

    ksheritage Member

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    The decel popping occurs at both high and low rps. It starts as soon as you downshift.

    The dealership used the SERT to remap.

    Thanks for the help.
     
  7. HDDon

    HDDon Experienced Member Contributor Retired Moderators

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    I have the SERT, Andrews 26G cams, S&S gear drive and K&N AC, and have no decell pop. If everything is tight on your bike (no intake or exhaust leaks) your dealer should be ablt to tune the bike.
     
  8. 90FXRS

    90FXRS Junior Member Contributor

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    If everything has a good seal and is tight, you might want to have them adjust the DE table in the mapping. Upon deceleration it might be sending too many pulses to the injectors.