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cummins isb 6.7 black smoke no powers

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by wtokhi, Jul 10, 2022.

Page 2 of 2
  1. Jul 11, 2022 #11
    spsauerland

    spsauerland Road Train Member

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    May 31, 2010
    West Harrison, In
    0
    Shouldn't be smoking at all so we can also assume DPF is breached since you said with downpipe removed it still blows black smoke. Need to verify all air management sensors, tubes, intake, and venturi pipe are somewhat clean, then move on to further troubleshooting
     
    spsauerland, Jul 11, 2022
    spsauerland, Jul 11, 2022
    #11
    AModelCat, wtokhi, Goodysnap and 2 others Thank this.
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  3. Jul 11, 2022 #12
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

    1,810
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    Jun 14, 2009
    romulus,mi
    0
    Monitor all sensor temps. and pressures with Insite at KOEO. You may have a pressure sensor stuck in range. Remember, the sensors could be reading too high or low of values, but since they are still reading, the ECM won't see a fault.
     
    QUALITYTRUCK, Jul 11, 2022
    QUALITYTRUCK, Jul 11, 2022
    #12
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  4. Jul 11, 2022 #13
    wtokhi

    wtokhi Light Load Member

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    Nov 3, 2017
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    Lol makes sense, I’ll see what it’s reading, should be around atmospheric pressure right right ?
     
    wtokhi, Jul 11, 2022
    wtokhi, Jul 11, 2022
    #13
  5. Jul 11, 2022 #14
    wtokhi

    wtokhi Light Load Member

    251
    115
    Nov 3, 2017
    0
    Egr crossover and all ports are clean, gonna take off the manifold in a bit and see what it looks like
     
    wtokhi, Jul 11, 2022
    wtokhi, Jul 11, 2022
    #14
  7. Jul 11, 2022 #15
    wtokhi

    wtokhi Light Load Member

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    Nov 3, 2017
    0
    Figured it out guys, y’all were right, thought it was clear since I was getting suction, saw intake pressure was low, never seen it that bad
     

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    wtokhi, Jul 11, 2022
    wtokhi, Jul 11, 2022
    #15
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  8. Jul 11, 2022 #16
    AModelCat

    AModelCat Road Train Member

    29,256
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    Jul 7, 2015
    Canuckistan
    0
    F### EGR. That's exactly why these new engines blow up twice as often as they did back in the early 2000s.
     
    AModelCat, Jul 11, 2022
    AModelCat, Jul 11, 2022
    #16
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  9. Jul 11, 2022 #17
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

    1,810
    1,773
    Jun 14, 2009
    romulus,mi
    0
    Imagine how well your body would function if you were forced to eat your own waste!
     
    QUALITYTRUCK, Jul 11, 2022
    QUALITYTRUCK, Jul 11, 2022
    #17
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