W900 accel pedal conversion

Discussion in 'Kenworth Forum' started by Jeremyjdean92, Jun 17, 2019.

  1. Jeremyjdean92

    Jeremyjdean92 Bobtail Member

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    Jun 17, 2019
    0
    Hey yall.
    So this new flyby wire pedal sucks, what sucks worse is the touchyness of the newer 06.5+ firewall mounted accel pedal in the w900 and t800s.
    The pedal is so jerky and can be so inconstant it almost makes me wanna park my rig and buy something else.
    It's a 2014 w900L
    Isx15
    I'm looking into converting the pedal back to floor mount. I have heard on some groups guys have done it and are much happier with it.
    I'm wondering if anyone has done it in this forum.
    And if I acquire a factory floor mount pedal, how difficult would it be to mount. Or if the factory holes are still in the newer kw floor pan.
    Any help would be very appreciated.
     
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  3. Lyle H

    Lyle H Heavy Load Member

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    Apr 16, 2014
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    It may not be the pedal that’s your problem.
    There are two different throttle settings in your ecm. One is much more sensitive than the other.
    It’s been a few years since I researched this on my own truck, but you should be able to figure it out with a little research of your own.
     
  4. Jeremyjdean92

    Jeremyjdean92 Bobtail Member

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    Jun 17, 2019
    0
    Already changed the accel governor.
    Throttle didn't know light pedal from WOT.
    But I'm guessing it has to do with my ecm tuning.
    My engine is running a pre emission calibration. If that makes any sense
     
  5. spsauerland

    spsauerland Road Train Member

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    West Harrison, In
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    Small bungee strap helps.
     
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  6. TMS Farms

    TMS Farms Bobtail Member

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    Oct 3, 2019
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  7. TMS Farms

    TMS Farms Bobtail Member

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    Oct 3, 2019
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    We have done this conversion in a ‘10 T660 using a Williams control wm-526 402661 pedal assembly. You have to either splice wires or re-pin the short factory pedal harness end onto the new foot pedal wire harness. Fairly simple—we re-pinned since there was plenty of wire lead on the new pedal assembly.
     

    Attached Files:

    Last edited: Oct 3, 2019
    Vampire, RubyEagle and QUALITYTRUCK Thank this.
  8. Jeremyjdean92

    Jeremyjdean92 Bobtail Member

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    Jun 17, 2019
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    I recently did mine as well. However I couldn't figure out the new pinning needed for the new TPS. So I reused the old one from the hanging pedal.
     

    Attached Files:

    Vampire Thanks this.
  9. W903B

    W903B Light Load Member

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    Jun 5, 2016
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    Very Well Done!!! I will replace mine too.
     
  10. TMS Farms

    TMS Farms Bobtail Member

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    Oct 3, 2019
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    You won’t be disappointed....so much better
     
    Vampire Thanks this.
  11. aphauling

    aphauling Bobtail Member

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    Mar 12, 2020
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    I have a 2016 T800 I want to change to a floor mount, does it have to be calibrated?
     
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