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DD16 starter cutting out

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by westernone, Aug 17, 2023.

  1. Aug 17, 2023 #1
    westernone

    westernone Bobtail Member

    2
    0
    Aug 17, 2023
    0
    I have a 2021 Western Star 4900 with a DD16, and the starter will engage for about half a second before it cuts out. The key is still in "engine start" position (engine is not running at this point). This will happen 4 out of every 5 times I try to start the truck. All the inputs and outputs seem to be fine, I've installed a new starter, I've put in my spare ECU to test, and the problem persists. Im running out of ideas. Has anybody come across this before?
     
    westernone, Aug 17, 2023
    westernone, Aug 17, 2023
    #1
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  3. Aug 17, 2023 #2
    Jesh574

    Jesh574 Bobtail Member

    8
    6
    Jul 26, 2023
    Alaska
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    What transmission do you have? Is this setting any codes?
     
    Jesh574, Aug 17, 2023
    Jesh574, Aug 17, 2023
    #2
  4. Aug 17, 2023 #3
    westernone

    westernone Bobtail Member

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    Aug 17, 2023
    0
    It has an Eaton 18Spd. No codes.
     
    westernone, Aug 17, 2023
    westernone, Aug 17, 2023
    #3
  5. Aug 17, 2023 #4
    SmallPackage

    SmallPackage Road Train Member

    5,704
    18,231
    Dec 20, 2019
    Marion Texas
    0
    Could be a bad ground cable connection. Every starter needs a good independent ground strap to the truck frame to work. Check that connection. May be loose or corroded. It doesn’t take much to cause starter to go dead when it draws all those cca’s from the batteries.
     
    SmallPackage, Aug 17, 2023
    SmallPackage, Aug 17, 2023
    #4
  7. Aug 19, 2023 #5
    little cat 500

    little cat 500 Road Train Member

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    Jan 17, 2010
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    switch on the clutch pedal maybe
     
    little cat 500, Aug 19, 2023
    little cat 500, Aug 19, 2023
    #5
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