Volvo VN/D13 issue

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Jet_Fuelstein, Mar 2, 2020.

  1. Jet_Fuelstein

    Jet_Fuelstein Bobtail Member

    11
    7
    Mar 2, 2020
    0
    NOx test while rolling didn't seem abnormally high, started climbing into single digits, never above 8. Pulled DPF apart and it looks as clean as when I just put it in, nothing indicative of a clog. Didn't have a lot of time but I pulled the valve cover so see if there was any in-your-face signs of overfueling, lobe scoring, and to be honest it looks pretty healthy for 650K. I'm really pretty lost here, EGR tested fine again, injector cut out test went as it should.
     
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  3. spsauerland

    spsauerland Road Train Member

    4,296
    10,887
    May 31, 2010
    West Harrison, In
    0
    Did decomp tube or scr catalyst face have any buildup of crystallized DEF?
     
  4. 41 cat

    41 cat Bobtail Member

    3
    0
    Mar 5, 2020
    0
    Possible EGR valve stuck open but showing closed on PTT?
     
  5. 41 cat

    41 cat Bobtail Member

    3
    0
    Mar 5, 2020
    0
    Or any solution to your problem? Just saw this is almost 4 years old...
     
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