Coughing

Discussion in 'Softail Models' started by Richard1029, Sep 26, 2013.

  1. Richard1029

    Richard1029 Member

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    I have a 2005 heritage from the beginning it's coughed when it is cold but now it's getting worse. HD mech. re-jeted the carb and installed a high flow air filter. anyone have the same and what did you do to fix the issue.
     
  2. Bodeen

    Bodeen Well-Known Member Staff Member Moderator Contributor

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    Welcome to the Forum!

    What jets are in the carb now? Could very well be a an intake leak. Could still be to lean. When does the cough occur, at idle, part throttle? How many miles on the bike? How long ago was the carb re-jetted? More info = better help.
     
  3. doctor727

    doctor727 Active Member

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    Also, where do you live? Low or high country.
     
  4. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    Carb coughing or spit back is usually an indication of a lean condition
    If it only happens at a particular throttle position or under specific conditions having that info can help us narrow down possible remedies
    Please give us more information to work with
    But do start by checking for an intake leak

    Brian
     
  5. Slo-Ryd

    Slo-Ryd Junior Member Contributor

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    I'd suggest what fin has already mentioned and check it for intake leaks with some WD-40. Also take a look here for other posts from members with similar issues.... Harley Davidson Forums
     
  6. Richard1029

    Richard1029 Member

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    The re-jet was done right after I got the bike 2005I think he said he went one size bigger. I replaced the intake seals and the MAP seal gromet. It coughs only when I start to accelerate. in like third gear. Somtimes it coughs even on the freeway going 55 to 60 mph. Idle's ok, starts ok, once warmed up runs ok.
     
  7. Richard1029

    Richard1029 Member

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    I live in riverside corona area of Calif.
     
  8. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    If it does not have any problems when the engine is fully warm then I would suspect that the carb is correctly set up
    With modern efi systems there are a number of sensors on the bike monitoring all the conditions of the things the will affect the fuel needs of the engine it feeds that info back to a computer that then adjusts for the correct fuel at that moment in time
    A carbed bike is different it has a carb that can be set up to run well on a fully warm engine however it will be weak on a cold engine to compensate for the weak condition an enricher is fitted this is controlled by a knob on the left side of the bike
    Backing off the enricher knob too early will cause a weak condition during engine warm up

    Brian
     
  9. Richard1029

    Richard1029 Member

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    I do pull out the enricher knob when it's cold but it starts making its way back in about five or seven miles out. some mornings it will still cough even though I have the enricher out. Would it help if I increase the Idle just a bit? or how do you know if the MAP sensor is working? From what I read in the manual it's critical for the engine to run correctly.
    Rich
     
  10. Jack Klarich

    Jack Klarich Expert Member

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    You can snug the nut on the back side but go easy, the housing is plastic