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Dt466e dropping cylinders

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Fznh2o, Jan 24, 2020.

  1. Jan 24, 2020 #1
    Fznh2o

    Fznh2o Bobtail Member

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    Jan 24, 2020
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    Need a little help. I have a 98 dt466e that when it warms up it drop 1 2 and 3 cylinders. Only does it after running 15-20 minutes. Already replaced IDM , Oil pump and fuel pressure is aound 50 psi. Only does it once it heats up. Oh and it all started at once. Any ideas.
    Thanks
     
    Fznh2o, Jan 24, 2020
    Fznh2o, Jan 24, 2020
    #1
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  3. Jan 24, 2020 #2
    Raffito

    Raffito Light Load Member

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    Aug 25, 2019
    Ingram, TX
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    You need to figure out which one it drop first and go from there, probably wiring issue to that injector or the injector itself.
     
    Raffito, Jan 24, 2020
    Raffito, Jan 24, 2020
    #2
  4. Jan 26, 2020 #3
    Fznh2o

    Fznh2o Bobtail Member

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    Jan 24, 2020
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    They all drop at once. Turn off the truck and let it set for a few minutes it runs fine and then drop again.
     
    Fznh2o, Jan 26, 2020
    Fznh2o, Jan 26, 2020
    #3
  5. Jan 26, 2020 #4
    Heavyd

    Heavyd Road Train Member

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    Probably a shorted injector coil that needs a certain temp to fail at. ECM cannot pinpoint which one, so kills the bank, (1, 2 and 3).
     
    Heavyd, Jan 26, 2020
    Heavyd, Jan 26, 2020
    #4
    hatchhero, spsauerland, pushbroom and 1 other person Thank this.
  7. Jan 26, 2020 #5
    Raffito

    Raffito Light Load Member

    84
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    Aug 25, 2019
    Ingram, TX
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    You need to have a scanner hook up and monitor diagnostic code at the time of drop off. It will show which injector first than will shows all three. That why you will know which one the replace.
     
    Raffito, Jan 26, 2020
    Raffito, Jan 26, 2020
    #5
  8. Jan 26, 2020 #6
    Fznh2o

    Fznh2o Bobtail Member

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    Jan 24, 2020
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    Gonna pass this on but the shop was saying it didn't show 1 individual injector dropping it's the whole bank at once. This is a 96 model idk if it shows individual injectors. I do know when it's hooked up to the laptop you can't cut off each injector like you can on the later engines. It only let's you do bank 1 or 2.
     
    Fznh2o, Jan 26, 2020
    Fznh2o, Jan 26, 2020
    #6
  9. Jan 26, 2020 #7
    Raffito

    Raffito Light Load Member

    84
    53
    Aug 25, 2019
    Ingram, TX
    0
    One thing you can do is measure injector coils resistance when engine is cold. (I would measure all injector at valve cover). And again when at operating temp. or when injector dropping. If any injector is measuring more than that you need to inspect injector harness under valve cover and measure injector directly.
     
    Raffito, Jan 26, 2020
    Raffito, Jan 26, 2020
    #7
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