Bucking in first gear

Discussion in 'Transmission' started by bwalsh22, Jun 6, 2008.

  1. bwalsh22

    bwalsh22 Junior Member

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    I had a similar problem with my Dyna, actually broke down on me twice. I got it to Harley the 2nd time and turned out to be the ECM, which was all covered under warranty. Any Check Engine light coming? I had that as well.
     
  2. glider

    glider Veteran Member

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    I doubt it's the transmission, it's probably either fuel or ignition. Did you recently get fuel before this problem started?
     
  3. Doc 1

    Doc 1 Member

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    Unplug the PCIII and try it again...if the problem goes away it's in the PCIII if not it very well could be the ECM.
     
  4. glider

    glider Veteran Member

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    Do as Doc 1 suggested. There have been some PC III's going bad recently, worth a try.
     
  5. cdn-bigfoot

    cdn-bigfoot Junior Member

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    I had a scooter did this when the mixture wasn't quite right.
    Yeah a 50cc scooter with a mikuni carb. It's called "bogging".

    I would say it's probably a little rich. Especially at lower rpm's.
    Get your PCM checked.
    Worth replacing your fuel filter as well.
     
  6. 6Stringer

    6Stringer Member

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    It turned out to be a bad PCIII. The dealer put it on the dyno and let it run until it started bucking and lurching after 40 miles. They swapped out the PCIII for a new one, and let it run for 100 miles and no more problem. I just took it out for 2 hours and it ran perfectly and there was no more popping on decel which was happening a lot lately. It even starts quicker. When I called Dynojet the other day and asked if they were getting calls about this problem, they said no. If you've been heaing about bad PCIII's, they'er either lying or in a state of denial.
     
  7. Fisher

    Fisher Account Removed

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    They have an issue with compatability.They also refuse to admit there's a problem when the building is on fire.