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MBN ecm

Discussion in 'Trucks [ Eighteen Wheelers ]' started by HEZ1980, Oct 26, 2023.

  1. Oct 26, 2023 #1
    HEZ1980

    HEZ1980 Bobtail Member

    6
    4
    Oct 12, 2023
    0
    I have a MBN that smokes like a mechanical engine. I'm not sure what all has been done to the motor. I swapped the ecm with another off of a MBN that my buddy has. He had Antrim set it up to a true 550 and it still smokes the same. I recently broke 3 out of the 4 bolts that hold down the Jake and rocker assembly above cylinders 3&4 along with breaking the Jake in half. It still had all 12pt bolts in it so I upgraded them to the heavier 6pts. So I have 9 6pts and 3 12 pts like they call for. With that said I'm doubtful someone has changed anything to 6nz parts but I could be wrong. This is my first bridge motor and trying to figure it out. What should be my next step. TIA
     
    HEZ1980, Oct 26, 2023
    HEZ1980, Oct 26, 2023
    #1
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  3. Oct 28, 2023 #2
    little cat 500

    little cat 500 Road Train Member

    2,055
    1,100
    Jan 17, 2010
    Abbottstown PA
    0
    probably has a 6nz file. if Antrim worked on it. there is no mbn 550 file
     
    little cat 500, Oct 28, 2023
    little cat 500, Oct 28, 2023
    #2
    bjytech Thanks this.
  4. Oct 29, 2023 #3
    bjytech

    bjytech Light Load Member

    244
    221
    Nov 9, 2013
    Ohio
    0
    First things first with excessive smoke, cover the basics, check air filters and for boost leaks, and have someone hook up to it and verify boost sensor reads correctly. After that since you don't really know what's been done to the engine, I would pull a valve cover to see exactly what part number injector is in it.
     
    bjytech, Oct 29, 2023
    bjytech, Oct 29, 2023
    #3
  5. Oct 30, 2023 #4
    DDguy

    DDguy Light Load Member

    157
    101
    Apr 21, 2020
    Ont. Canada
    0
    Check if the Boost sensor has a Resistor in the Green Wire somewhere
     
    DDguy, Oct 30, 2023
    DDguy, Oct 30, 2023
    #4
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