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Random high idle

Discussion in 'Kenworth Forum' started by Gsxrrcr, Aug 13, 2018.

  1. Aug 13, 2018 #1
    Gsxrrcr

    Gsxrrcr Bobtail Member

    1
    0
    Aug 13, 2018
    0
    Hi! My truck randomly kicks the idle up to 7-800 rpms. It’s not doing a regen but does anyone know if this is normal or not? Thanks!
     
    Gsxrrcr, Aug 13, 2018
    Gsxrrcr, Aug 13, 2018
    #1
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  3. Aug 14, 2018 #2
    Roberts450

    Roberts450 Road Train Member

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    3,634
    Feb 6, 2016
    0
    What year truck and what engine? How long does it idle up for? What is the normal idle rpm? How long are you idling before it kicks up?
     
    Roberts450, Aug 14, 2018
    Roberts450, Aug 14, 2018
    #2
    Oxbow Thanks this.
  4. Sep 2, 2018 #3
    cowboymagic81

    cowboymagic81 Bobtail Member

    10
    1
    Sep 2, 2018
    0
    My 2013 T660 does the same BS. Normal idle is around 550-ish, but will idle up randomly from time to time around the 750-800 mark w/increased engine oil temp. I had asked a mechanic this once before, and he claimed it's called "passive regen". Idk, but personally, it's annoying as hell. Hope you find out if this is normal or not, cause I'd like to know myself.
     
    cowboymagic81, Sep 2, 2018
    cowboymagic81, Sep 2, 2018
    #3
  5. Sep 9, 2018 #4
    J Rich

    J Rich Medium Load Member

    363
    380
    May 28, 2018
    Atlanta Ga
    0
    I have a 2016 T880 with a ISX15 it does the same thing. It is the passive regeneration. Nothing to worry about and no way to stop it.
     
    J Rich, Sep 9, 2018
    J Rich, Sep 9, 2018
    #4
  7. Sep 9, 2018 #5
    Dave_in_AZ

    Dave_in_AZ Road Train Member

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    May 4, 2015
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    It's the Cummins regen mode. It probably changes pitch at that time too.
     
    Dave_in_AZ, Sep 9, 2018
    Dave_in_AZ, Sep 9, 2018
    #5
  8. Sep 9, 2018 #6
    Snakeschasingcars

    Snakeschasingcars Heavy Load Member

    743
    1,568
    Mar 22, 2018
    0
    Stop idling.

    Problem solved
     
    Snakeschasingcars, Sep 9, 2018
    Snakeschasingcars, Sep 9, 2018
    #6
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