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2016 PX-9 Exh. gas pressure above max.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by habfleet, Nov 2, 2019.

Page 1 of 2
  1. Nov 2, 2019 #1
    habfleet

    habfleet Light Load Member

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    Feb 5, 2012
    elwood nj
    0
    Perform a Aftertreatment Regen Analyzer using Insite . Fails due to Exh gas temp above max, I have removed EGR inspected and cleaned,replaced diffirential pressure sensor and cleaned both ports.cleaned exh. gas pressure tube .Insite showing 100% egr cooler efficiency . Any ideas what problem may be ? Exh pressure sensor > Thanks in advance
     
    habfleet, Nov 2, 2019
    habfleet, Nov 2, 2019
    #1
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  3. Nov 2, 2019 #2
    Goodysnap

    Goodysnap Road Train Member

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    Please share regen history from Insite. I think your analyzer is pointing to elavated DPF temps not EGR.

    Any fault codes?

    Make sure and double check the cross drilling in the intake. Remove the allen plug and make sure a drill bit runs all the way through by hand. Follow with a rifle brush.
     
    Last edited: Nov 2, 2019
    Goodysnap, Nov 2, 2019
    Goodysnap, Nov 2, 2019
    #2
    spsauerland and habfleet Thank this.
  4. Nov 2, 2019 #3
    habfleet

    habfleet Light Load Member

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    Feb 5, 2012
    elwood nj
    0
    Original fault code was a 3382 . I did the above sent the trk out day later came with same code . Performed DPF Regen. Analyzer the test will not complete ,because status window shows "Exh gas pressure is above maximum spec." no it did not set a fault code .
     
    habfleet, Nov 2, 2019
    habfleet, Nov 2, 2019
    #3
  5. Nov 2, 2019 #4
    Goodysnap

    Goodysnap Road Train Member

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    20191102_181717.jpg
     
    Goodysnap, Nov 2, 2019
    Goodysnap, Nov 2, 2019
    #4
    spsauerland, pushbroom and habfleet Thank this.
  7. Nov 2, 2019 #5
    habfleet

    habfleet Light Load Member

    163
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    Feb 5, 2012
    elwood nj
    0
    I replaced the EGR gas temp sensor reran test same result . Could the EGR cooler be plugged even thou Insite is telling me 100% effiency ? the trk is 3yrs old but only 40,000 miles that the cooler would still be at 100% ??
     
    habfleet, Nov 2, 2019
    habfleet, Nov 2, 2019
    #5
  8. Nov 2, 2019 #6
    habfleet

    habfleet Light Load Member

    163
    23
    Feb 5, 2012
    elwood nj
    0
    Barometeric air pressure 30.2 inhg Exhaust gas pressure 137.15 inhg during active regen
     
    habfleet, Nov 2, 2019
    habfleet, Nov 2, 2019
    #6
    Goodysnap Thanks this.
  9. Nov 2, 2019 #7
    Goodysnap

    Goodysnap Road Train Member

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    Report back with readings KOEO after cold soak.
     
    Goodysnap, Nov 2, 2019
    Goodysnap, Nov 2, 2019
    #7
    spsauerland and pushbroom Thank this.
  10. Nov 2, 2019 #8
    habfleet

    habfleet Light Load Member

    163
    23
    Feb 5, 2012
    elwood nj
    0
    Cold Soak Barometric air pressure 30.1 inhg Exhaust gas pressure 30.40 inhg
     
    habfleet, Nov 2, 2019
    habfleet, Nov 2, 2019
    #8
  11. Nov 2, 2019 #9
    Goodysnap

    Goodysnap Road Train Member

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    Those readings are all good. I don't think I would go digging further without a fault code. I say put her back to work. Maybe Cummins could give some insite to the fault.

    Is the engine software level current? How many times did you run the analyzer with a fail?
     
    Goodysnap, Nov 2, 2019
    Goodysnap, Nov 2, 2019
    #9
    habfleet and spsauerland Thank this.
  12. Nov 2, 2019 #10
    spsauerland

    spsauerland Road Train Member

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    May 31, 2010
    West Harrison, In
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    EGR shouldn't be flowing @ all during regen. Sounds more like turbo or after treatment issue. Regen temps from after treatment history would help like @Goodysnap posted. Don't know how lucky you are for his free time and information.
     
    spsauerland, Nov 2, 2019
    spsauerland, Nov 2, 2019
    #10
    Goodysnap Thanks this.
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