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Isx shutting down randomly

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by RSB34, Aug 29, 2018.

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  1. Aug 29, 2018 #11
    RSB34

    RSB34 Light Load Member

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    Feb 9, 2013
    ny.
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    The shop only has a doner for a cm870 they have different connections. Have not been able to locate a doner.
     
    RSB34, Aug 29, 2018
    RSB34, Aug 29, 2018
    #11
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  3. Aug 29, 2018 #12
    RSB34

    RSB34 Light Load Member

    272
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    Feb 9, 2013
    ny.
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    Mobile repair Boise had said checking the ground from the frame to the block.so far I have not found a direct frame to block ground. I found frame to starter then starter to block. And frame to cab. There has to be one I would think. That may be a problem
     
    RSB34, Aug 29, 2018
    RSB34, Aug 29, 2018
    #12
  4. Aug 29, 2018 #13
    VWbeagle

    VWbeagle Bobtail Member

    17
    11
    Dec 21, 2016
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    Been having problems with one of the trucks in the fleet similar to the issues you are having. Turned out to be a loose fuel fitting on the “T” fitting under the cab going to the filter, kept sucking in air and shutting down.
     
    VWbeagle, Aug 29, 2018
    VWbeagle, Aug 29, 2018
    #13
  5. Aug 30, 2018 #14
    RSB34

    RSB34 Light Load Member

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    Feb 9, 2013
    ny.
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    I don’t know if this will mean anything. When I turn my key on the lift pump takes a few minutes to turn on. If you try starting it. It will just crank. There will be no power to the fuel shut off ( between the fuel timers and meters) when the lift pump kicks on there is power to the fuel shut off. When the truck dies it loses power to the fuel shut off.
     
    RSB34, Aug 30, 2018
    RSB34, Aug 30, 2018
    #14
  7. Aug 30, 2018 #15
    RSB34

    RSB34 Light Load Member

    272
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    Feb 9, 2013
    ny.
    0
    Also ther is no power to the shut off
     
    RSB34, Aug 30, 2018
    RSB34, Aug 30, 2018
    #15
  8. Aug 30, 2018 #16
    Dave_in_AZ

    Dave_in_AZ Road Train Member

    49,735
    314,852
    May 4, 2015
    0
    Dave_in_AZ, Aug 30, 2018
    Dave_in_AZ, Aug 30, 2018
    #16
  9. Aug 30, 2018 #17
    Techmaster

    Techmaster Bobtail Member

    5
    0
    Aug 12, 2018
    0
    Any active/inactive codes?
     
    Techmaster, Aug 30, 2018
    Techmaster, Aug 30, 2018
    #17
  10. Aug 30, 2018 #18
    Justrucking2

    Justrucking2 Road Train Member

    3,211
    4,291
    Sep 12, 2017
    Plymouth MI
    0
    Turn the key and have a buddy hit the ECM with a screwdriver. See what happens. ECMs do wear out. I have a new one sitting in my closet, 2008 CM-871... Lifespan on an ECM is 8 to 10 years. Just saying.
     
    Justrucking2, Aug 30, 2018
    Justrucking2, Aug 30, 2018
    #18
    Oldironfan Thanks this.
  11. Aug 30, 2018 #19
    RSB34

    RSB34 Light Load Member

    272
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    Feb 9, 2013
    ny.
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    The dealer it was at just said it was the ecm was losing contact. They ran a new wire from the ecm to the circuit breaker. Said all was good as soon as it left the shop it was stalling again.
     
    RSB34, Aug 30, 2018
    RSB34, Aug 30, 2018
    #19
  12. Aug 30, 2018 #20
    RSB34

    RSB34 Light Load Member

    272
    195
    Feb 9, 2013
    ny.
    0
    At this point I’m leaning towards a ecm but hoping it was a simpler fix.
     
    RSB34, Aug 30, 2018
    RSB34, Aug 30, 2018
    #20
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