Optimal fuel psi for a C15

Discussion in 'Trucks [ Eighteen Wheelers ]' started by SHC, Nov 21, 2011.

  1. Nov 21, 2011 #1
    SHC

    SHC Spoiled Rotten Brat O/O

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    I have a MBN 475hp C15. My digital dash shows my fuel pressure at 86psi. Just wondering what the best PSI is for this motor and how do I go about raising it or lowering it?
     
    SHC, Nov 21, 2011
    SHC, Nov 21, 2011
    #1
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  3. Nov 21, 2011 #2
    oneshot

    oneshot Medium Load Member

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    Search, fuel pump question, and it will tellu how to raise it. 86 may be ok but I have my Acert at 107. U might want to put a gauge on it to make sure ur readout is correct.
     
    oneshot, Nov 21, 2011
    oneshot, Nov 21, 2011
    #2
    SHC Thanks this.
  4. Nov 21, 2011 #3
    Superhauler

    Superhauler TEACHER OF MEN

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    is that 86 at low idle or high idle? 86 is good at low idle and 100 at high idle.
     
    Superhauler, Nov 21, 2011
    Superhauler, Nov 21, 2011
    #3
    SHC Thanks this.
  5. Nov 22, 2011 #4
    SHC

    SHC Spoiled Rotten Brat O/O

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    It reads 86 all the time.... maybe the readout is bad???
     
    SHC, Nov 22, 2011
    SHC, Nov 22, 2011
    #4
  7. Nov 22, 2011 #5
    oneshot

    oneshot Medium Load Member

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    Id put a gauge on it and see low and high idle. Ur readout should fluctuate some.
     
    oneshot, Nov 22, 2011
    oneshot, Nov 22, 2011
    #5
  8. Nov 22, 2011 #6
    SHC

    SHC Spoiled Rotten Brat O/O

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    Funny part is that it never had a fuel pressure readout, then one day it just magically appeared on the datastar :biggrin_2556:

    I have no idea, but i figured it should fluxuate some. i will toss a gauge on it and see what she says cuz now I'm curious wtf is going on here???
     
    SHC, Nov 22, 2011
    SHC, Nov 22, 2011
    #6
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