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Engine cutting out.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Maddawg2020, Mar 20, 2019.

  1. Mar 20, 2019 #1
    Maddawg2020

    Maddawg2020 Bobtail Member

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    Apr 18, 2018
    0
    I have a 2004 Western Star 4900 with a 14L Detroit and 10spd Eaton Ultra Shift. 2 peddle.
    The problem is stutter shifting. Most prevalent 4 and 5 gear while turning also down shifting 10 to 9.
    The other problem is the engine misses when under a load but not continuous.
    Seems like a fuel restriction. Fuel filter is new.
    I've spent thousands on the transmission. I don't think it's a transmission issue.
    I'm at a loss a could use some help.
     
    Maddawg2020, Mar 20, 2019
    Maddawg2020, Mar 20, 2019
    #1
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  3. Mar 20, 2019 #2
    nasriza

    nasriza Road Train Member

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    Feb 1, 2013
    Chicago, IL
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    does it seems like the truck is coughing when it missed with a 14L detroit it's usually turbo or boost sensor, most of the time the vanes do not respond as quick as they supposed to and you get the cough plus a puff of black smoke.
     
    nasriza, Mar 20, 2019
    nasriza, Mar 20, 2019
    #2
  4. Mar 22, 2019 #3
    Freightliner Classic

    Freightliner Classic Light Load Member

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    Dec 17, 2018
    Rome GA
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    Try doing and over head
     
    Freightliner Classic, Mar 22, 2019
    Freightliner Classic, Mar 22, 2019
    #3
  5. Apr 22, 2019 #4
    MaddawgKC

    MaddawgKC Bobtail Member

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    Apr 20, 2019
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    The EGR was deleted. the miss is more like fuel being shut off briefly, the back on. it happens sporadically and last for a split second. No smoke.
     
    MaddawgKC, Apr 22, 2019
    MaddawgKC, Apr 22, 2019
    #4
  7. Apr 22, 2019 #5
    MaddawgKC

    MaddawgKC Bobtail Member

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    Apr 20, 2019
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    Thats been done twice in the past 6 months.
     
    MaddawgKC, Apr 22, 2019
    MaddawgKC, Apr 22, 2019
    #5
  8. Apr 22, 2019 #6
    Intothesunset

    Intothesunset Road Train Member

    2,290
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    Apr 15, 2019
    truck
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    Has turbo been looked at? If you are using the VGT turbo replace it with a BW 141402x or equivalent no waste gated turbo. And program the ecm also.
     
    Intothesunset, Apr 22, 2019
    Intothesunset, Apr 22, 2019
    #6
  9. Apr 24, 2019 #7
    Maddawg2020

    Maddawg2020 Bobtail Member

    2
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    Apr 18, 2018
    0
    Yes,
    PDI turbo with new exhaust manifold, however getting good boost has been an issue. Started at 19 # after thee times back to shop they have achieved up to 29#. Before the upgrade the engine was producing 33-36# of boost.
    I've questioned if the correct turbo was installed and they said it was correct.
     
    Maddawg2020, Apr 24, 2019
    Maddawg2020, Apr 24, 2019
    #7
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