Author [NL] [FR] [ES] [DE] [SE] [IT] Topic: Idle issues after tuneup  (Read 2040 times)

0 Members and 1 Guest are viewing this topic.

  • Offline THRASHED   us

    • Trophy Member  ‐    71
    • **
    • Topic Author

    Offline THRASHED

    • Trophy Member
    • **
    • Topic Author
    • Posts: 71
    • Bike: 2013 Trophy
    • City / Town: San Dimas
    • Country: us
    Idle issues after tuneup
    on: Jun 02, 2021, 11.55 am
    Jun 02, 2021, 11.55 am
    Just finished major tune-up.  Air filter, fuel filter, valve adjustment, oil/coolant changes.  Bike started right up and sounds great.  Seems to have quicker throttle response.  Issue is: after warming up, it does not want to idle.  Almost like it got used to the way it was before and has to relearn everything.  I do have the Dealer Tool.  Is this likely an adjustment?

  • Offline Yaga1973   us

    • Trophy Pro  ‐    354
    • ***
      #1

    Offline Yaga1973

    • Trophy Pro
    • ***
    • Posts: 354
    • Bike: 2009 HD Road King
    • City / Town: New Braunfels, TX
    • Country: us
    Re: Idle issues after tuneup
    Reply #1 on: Jun 02, 2021, 01.06 pm
    Jun 02, 2021, 01.06 pm
    Have you tried doing the idle relearn procedure?
    Ride safe, ride often!

    One of the "New" Founding Members of the Twisted Trophies
    2009 Harley-Davidson Road King
    2017 TTSE - Blue (Sold)

  • Offline Coconut   gb

    • Trophy God  ‐    9939
    • *****
      #2

    Offline Coconut

    • Trophy God
    • *****
    • Posts: 9939
    • Bike: 2017 Trophy SE
    • City / Town: South Birmingham
    • Country: gb
    Re: Idle issues after tuneup
    Reply #2 on: Jun 02, 2021, 01.24 pm
    Jun 02, 2021, 01.24 pm
    The reason-learn process is called ďAdaptionĒ.

    Hereís what to do :

    Itís a good idea to pull the fuse for the headlight
    to prevent the risk of it overheating !

    From COLD - Start the engine WITHOUT touching the throttle
    while starting and throughout the whole process.

    Let the engine run and warm up until the cooling fans operate.

    Leave it running for at least a further 12 minutes.

    Switch off the engine - Job Done !  :028:


    Last Edit: Jun 02, 2021, 01.26 pm by Coconut

  • Offline Yaga1973   us

    • Trophy Pro  ‐    354
    • ***
      #3

    Offline Yaga1973

    • Trophy Pro
    • ***
    • Posts: 354
    • Bike: 2009 HD Road King
    • City / Town: New Braunfels, TX
    • Country: us
    Re: Idle issues after tuneup
    Reply #3 on: Jun 02, 2021, 05.52 pm
    Jun 02, 2021, 05.52 pm
    Thank you, Coconut - I figured you'd be along with full version of how to perform the "adaptation" process soon!
    Ride safe, ride often!

    One of the "New" Founding Members of the Twisted Trophies
    2009 Harley-Davidson Road King
    2017 TTSE - Blue (Sold)

  • Offline STJIM   us

    • Trophy Pro  ‐    410
    • ***
      #4

    Offline STJIM

    • Trophy Pro
    • ***
    • Posts: 410
    • Bike: 2015 TTSE ( Blue )
    • City / Town: West Michigan
    • Country: us
    Re: Idle issues after tuneup
    Reply #4 on: Jun 05, 2021, 12.58 am
    Jun 05, 2021, 12.58 am
    I wonder if you have an air leak at one of the rubber couplers between the throttle bodies and intake manifold spigots ?

    Were the clamps loosened to pull back the throttle body assy a bit to aid in removing the cam cover ?

    Don't ask me why I suspect this.
    Last Edit: Jun 05, 2021, 01.00 am by STJIM
    IBA #35372
    BBG  5-2014  SS3K 9-2020
    Great Lakes 100 :  2011 & 2019
    2015 TTSE , 2008 Concours C-14
    1998 ST1100

  • Offline THRASHED   us

    • Trophy Member  ‐    71
    • **
    • Topic Author
    • #5

    Offline THRASHED

    • Trophy Member
    • **
    • Topic Author
    • Posts: 71
    • Bike: 2013 Trophy
    • City / Town: San Dimas
    • Country: us
    Re: Idle issues after tuneup
    Reply #5 on: Jun 09, 2021, 09.20 pm
    Jun 09, 2021, 09.20 pm
    Thanks, as always, Coconut.  That helped, but did not totally fix the issue.  STJIM, did not have to loosen anything up.  Using the Dealer Tool shows that when the bike warms up, the carbs are not balanced. Sucks to have to remove everything again, but I'll get to it next week. Of course, after doing that, because STJIM brought it up, I'll check for air leaks before re-assembly.  Easiest way I know how to check is to spray ether (engine starting fluid) around any area that could be sucking in air.  Hopefully that will resolve all issues. Other than that, the bike runs smooth and quiet.

    One more item.  On my dealer tool it reads ~80kPa for the throttle balance.  In the manual, it shows ~480mmHg.  Is this important?  Or should they just be balanced?
    Last Edit: Jun 09, 2021, 09.48 pm by THRASHED

  • Offline STJIM   us

    • Trophy Pro  ‐    410
    • ***
      #6

    Offline STJIM

    • Trophy Pro
    • ***
    • Posts: 410
    • Bike: 2015 TTSE ( Blue )
    • City / Town: West Michigan
    • Country: us
    Re: Idle issues after tuneup
    Reply #6 on: Jun 09, 2021, 09.34 pm
    Jun 09, 2021, 09.34 pm
    Ya, ether should work fine.

    What I did was ( while the bike was running of course,  and the air box removed ) I placed the palm of my hand over each throttle body opening in succession.  If there aren't any leaks you should feel your palm being sucked in, and the engine speed decrease.  If you keep you palm over the throttle body intake, the engine might even stall.

    What I discovered was that for one cylinder, after covering the throttle body opening, it made little difference - the engine kept running just fine because air was being sucked into the poorly sealed joint past the throttle body where the throttle body connects to the spigot connected to the intake port of the cylinder head.  It turned out the clamp wasn't in the proper position and when I tightened it, it just didn't make any way a proper seal.  Me Bad - Live & Learn.

    IMHO, I would include this as part of the 20K mile check.

    The bike runs great now, BTW.
    Last Edit: Jun 09, 2021, 09.37 pm by STJIM
    IBA #35372
    BBG  5-2014  SS3K 9-2020
    Great Lakes 100 :  2011 & 2019
    2015 TTSE , 2008 Concours C-14
    1998 ST1100

  • Offline THRASHED   us

    • Trophy Member  ‐    71
    • **
    • Topic Author
    • #7

    Offline THRASHED

    • Trophy Member
    • **
    • Topic Author
    • Posts: 71
    • Bike: 2013 Trophy
    • City / Town: San Dimas
    • Country: us
    Re: Idle issues after tuneup
    Reply #7 on: Jun 09, 2021, 09.49 pm
    Jun 09, 2021, 09.49 pm
    Thanks for that.

     



    tweedy-bunch