Rpms at idle for MXS C15

Discussion in 'Trucks [ Eighteen Wheelers ]' started by SHOOT DEERE IT IS, May 17, 2016.

  1. May 17, 2016 #1
    SHOOT DEERE IT IS

    SHOOT DEERE IT IS Light Load Member

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    Recently bought a 2006 KW with a MXS C15. According to the tach it is idling around 400 rpm. Either the tach is off or it is idling too low. It seems that the tach is right to me but we'll see. Going to the shop to put the labtop to it tomorrow. Anyone have any ideas. What should I have them program it to idle at if the tach is correct?

    TIA
     
    SHOOT DEERE IT IS, May 17, 2016
    SHOOT DEERE IT IS, May 17, 2016
    #1
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  3. May 17, 2016 #2
    skateboardman

    skateboardman Road Train Member

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    My 06 Mxs idles at 700.
     
    skateboardman, May 17, 2016
    skateboardman, May 17, 2016
    #2
  4. May 17, 2016 #3
    swaan

    swaan Road Train Member

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    600-700 is normal.
    I like my cats to idle at 600.
     
    swaan, May 17, 2016
    swaan, May 17, 2016
    #3
  5. May 17, 2016 #4
    skateboardman

    skateboardman Road Train Member

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    The Mxs is set idle at 600 cold then bumps itself to 700 when a bit warm, that's spec for the acert Mxs.
     
    skateboardman, May 17, 2016
    skateboardman, May 17, 2016
    #4
  7. May 17, 2016 #5
    GrapeApe

    GrapeApe Road Train Member

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    I don't think it'd run too smooth at 400, 600 is the min setting, 700 is default. We leave ours at 700, new Pete mirrors shake too much at 600. If it's idling OK, it may just be a tach issue.
     
    GrapeApe, May 17, 2016
    GrapeApe, May 17, 2016
    #5
  8. May 18, 2016 #6
    Superhauler

    Superhauler TEACHER OF MEN

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    Hook et up and see, may just be tach. Idle should be 700. Cold mode it will idle at 600 then it will go to 700 after some heat is built up in engine.
     
    Superhauler, May 18, 2016
    Superhauler, May 18, 2016
    #6
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