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N14 problem

Discussion in 'Trucks [ Eighteen Wheelers ]' started by andreevans903, Oct 26, 2016.

Page 4 of 5
  1. Oct 27, 2016 #31
    andreevans903

    andreevans903 Bobtail Member

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    Mar 2, 2013
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    No cel or sel and I'm going to try with onsite again but the problem only comes when shifting to 8-10th gear and it does it every time not randomly
     
    andreevans903, Oct 27, 2016
    andreevans903, Oct 27, 2016
    #31
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  3. Oct 27, 2016 #32
    andreevans903

    andreevans903 Bobtail Member

    25
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    Mar 2, 2013
    0
    Oh could I trouble shoot a stuck injector unplug one at a time and drive it ? will that work
     
    andreevans903, Oct 27, 2016
    andreevans903, Oct 27, 2016
    #32
  4. Oct 27, 2016 #32
    maggard359

    maggard359 Medium Load Member

    476
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    Nov 20, 2013
    Florida
    0
    With engine cold start and feel each port on exhaust manifold. They should all warm up fairly equally. Cold port dead injector.
     
    maggard359, Oct 27, 2016
    maggard359, Oct 27, 2016
    #32
  5. Oct 27, 2016 #33
    andreevans903

    andreevans903 Bobtail Member

    25
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    Mar 2, 2013
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    All are heating up equally
     
    andreevans903, Oct 27, 2016
    andreevans903, Oct 27, 2016
    #33
  6. Oct 27, 2016 #34
    maggard359

    maggard359 Medium Load Member

    476
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    Nov 20, 2013
    Florida
    0
    I still wonder if you are starving for fuel. I am not very familiar with the cummins after the big cams but I believe there is a fuel check valve in an elbow at top left of ecm that has a spring and a check valve inside. It won't cost you anything but time, pull that out and take the elbow apart and clean it really good. See in the higher gears you are needing more fuel to provide the torque and if you don't have the fuel pressure or maybe it's blocked and staying in the head too long, you will lose power and it will knock and cutout and do all kinds of crazy things.
     
    maggard359, Oct 27, 2016
    maggard359, Oct 27, 2016
    #34
  8. Oct 27, 2016 #35
    andreevans903

    andreevans903 Bobtail Member

    25
    3
    Mar 2, 2013
    0
    I replaced that check valve already that comes out behind ecm I have bypassed all that today I ran straight from fuel pump to a bucket of fuel and returned to bucket of fuel and went down the road same thing I don't think fuel is the problem
     
    andreevans903, Oct 27, 2016
    andreevans903, Oct 27, 2016
    #35
  9. Oct 27, 2016 #36
    andreevans903

    andreevans903 Bobtail Member

    25
    3
    Mar 2, 2013
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    I even pulled the rocker boxes and checked the fuel crossovers
     
    andreevans903, Oct 27, 2016
    andreevans903, Oct 27, 2016
    #36
  10. Oct 27, 2016 #37
    andreevans903

    andreevans903 Bobtail Member

    25
    3
    Mar 2, 2013
    0
    If I put air to the sensor from air compressior I get smoke for a second then it clear up is that a good sensor or bad
     
    andreevans903, Oct 27, 2016
    andreevans903, Oct 27, 2016
    #37
  11. Oct 28, 2016 #38
    maggard359

    maggard359 Medium Load Member

    476
    413
    Nov 20, 2013
    Florida
    0
    Yes
     
    maggard359, Oct 28, 2016
    maggard359, Oct 28, 2016
    #38
    andreevans903 Thanks this.
  12. Oct 28, 2016 #39
    maggard359

    maggard359 Medium Load Member

    476
    413
    Nov 20, 2013
    Florida
    0
    Good sensor
     
    maggard359, Oct 28, 2016
    maggard359, Oct 28, 2016
    #39
    andreevans903 Thanks this.
  13. Oct 28, 2016 #40
    andreevans903

    andreevans903 Bobtail Member

    25
    3
    Mar 2, 2013
    0
    Truck is worrying me to death I'm taking it to the shop
     
    andreevans903, Oct 28, 2016
    andreevans903, Oct 28, 2016
    #40
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