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Only 18 pounds of boost at the gauge? C-12

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by NCoal, Nov 22, 2017.

  1. Nov 22, 2017 #1
    NCoal

    NCoal Bobtail Member

    11
    6
    Sep 20, 2015
    0
    Air to air is good, boots are good, just put new gaskets behind exhaust manifold. Any other ideas on why it would be so low? Couldn't pull a string out of a cats..well....you know...
     
    NCoal, Nov 22, 2017
    NCoal, Nov 22, 2017
    #1
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  3. Nov 23, 2017 #2
    BoxCarKidd

    BoxCarKidd Road Train Member

    4,525
    6,586
    Aug 26, 2014
    0
    No fuel no boost. Whats under your hood?
     
    BoxCarKidd, Nov 23, 2017
    BoxCarKidd, Nov 23, 2017
    #2
  4. Nov 23, 2017 #3
    NightWind

    NightWind Road Train Member

    2,714
    19,164
    Nov 11, 2006
    Sunny South, AL
    0
    After-cooler could be leaking you'll have to get it pressure checked.
     
    NightWind, Nov 23, 2017
    NightWind, Nov 23, 2017
    #3
  5. Nov 23, 2017 #4
    NCoal

    NCoal Bobtail Member

    11
    6
    Sep 20, 2015
    0
    After-cooler isn't leaking I had it checked but Im not sure where else to poke around? Is it possible for the turbine fins to wear without the S.O.B. exploding? Also changed all the fuel filters and air filters to cover my bases. Its a c-12 cat 2KS serial #
     
    NCoal, Nov 23, 2017
    NCoal, Nov 23, 2017
    #4
  7. Nov 23, 2017 #5
    spsauerland

    spsauerland Road Train Member

    4,296
    10,891
    May 31, 2010
    West Harrison, In
    0
    Wastegate stuck partially open?
     
    spsauerland, Nov 23, 2017
    spsauerland, Nov 23, 2017
    #5
  8. Nov 24, 2017 #6
    NCoal

    NCoal Bobtail Member

    11
    6
    Sep 20, 2015
    0
    Not quite sure how to check the waste gate but I’ll poke around today
     
    NCoal, Nov 24, 2017
    NCoal, Nov 24, 2017
    #6
  9. Nov 24, 2017 #7
    Bakerman

    Bakerman Road Train Member

    4,663
    8,812
    Jan 27, 2013
    Phoenix, AZ
    0
    Parameters set low on the ECM. Was this a fleet truck and is it new to you?
     
    Bakerman, Nov 24, 2017
    Bakerman, Nov 24, 2017
    #7
  10. Nov 25, 2017 #8
    NCoal

    NCoal Bobtail Member

    11
    6
    Sep 20, 2015
    0
    It is new to me and no I don’t think it was a fleet truck I check into the ECM, thanks
     
    NCoal, Nov 25, 2017
    NCoal, Nov 25, 2017
    #8
  11. Nov 25, 2017 #9
    cmrdev

    cmrdev Medium Load Member

    370
    373
    Oct 13, 2017
    0
    So is this just something that just started doing it? The truck was running good before? I’m assuming your gauge is working ok? Should be throwing a check engine light if there’s a boost problem
     
    cmrdev, Nov 25, 2017
    cmrdev, Nov 25, 2017
    #9
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