Need help.. cruse control/ high idle

Discussion in 'Kenworth Forum' started by mfd560, May 16, 2020.

  1. mfd560

    mfd560 Bobtail Member

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    May 16, 2020
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    I have a 07 T800 that I run a rolloff trailer with. I use the high idle constantly to speed up the hydro pump. Lately the high idle turns off on its own for no reason. Sometimes the high idle cuts out many times while I’m running the hydros. Can’t figure it out. The cruse control has never acted up while driving down the road. Just the high idle. I’m lost and looking for suggestions. Thanks in advance!!
     
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  3. blairandgretchen

    blairandgretchen Road Train Member

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    Clutch switch, park brake switch, service brake switch could all be intermittent culprits.
     
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  4. mfd560

    mfd560 Bobtail Member

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    Wouldn’t all those things also affect cruse control. Using cruse control hasn’t been an issue. Just high idle.
     
  5. mfd560

    mfd560 Bobtail Member

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    Would all those things also affect the cruse control?? The cruse control works with no issues. Just high idle.
     
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  6. blairandgretchen

    blairandgretchen Road Train Member

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    Yes they would. Jakes too.

    I might be looking at plugging to the ECM for a fault code read out, in case there was a parameter affecting the high idle.

    Something is kicking it out.
     
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  7. mfd560

    mfd560 Bobtail Member

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    It’s going in for overhead work, I’ll have them check it out.
     
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  8. blairandgretchen

    blairandgretchen Road Train Member

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    Sorry I don’t have any better ideas.

    Certainly post the solution for future reference if you resolve it.
     
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