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Cummins N14 no power

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by BigJoeTX, Jul 16, 2018.

  1. Jul 16, 2018 #1
    BigJoeTX

    BigJoeTX Bobtail Member

    27
    16
    Feb 13, 2018
    Katy TX
    0
    1995 IH 9400 N14 500hp
    Bought this truck in jan of this year,truck ran but was weak due to age. It burned 4 gallons of oil in 12k miles and fuel milage was around 5mpg.
    2 weeks ago i did overhaul on it,with new injectors,new heads,new exhaust manifold,new turbo all new fuel lines,new oil pump. Truck runs the same as before the overhaul,it's running weak.Fuel milage stays around 4.3- 4.5mpg. I have no codes no lights on dash nothing. Turbo boost showing 63psi on wot but truck is slow as hell. This is my 1st cummins engine so i don't know much about them,what do you guy's think the problem is? Could it be the fuel pump? Thanks in advance.
     
    BigJoeTX, Jul 16, 2018
    BigJoeTX, Jul 16, 2018
    #1
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  3. Jul 16, 2018 #2
    HopeOverMope

    HopeOverMope Road Train Member

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    I-20 LOUISIANA
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    Idk, maybe the fuel pump. Bad grounds, maybe. What exactly do you mean no power? That might help someone help you
     
    HopeOverMope, Jul 16, 2018
    HopeOverMope, Jul 16, 2018
    #2
  4. Jul 16, 2018 #3
    BigJoeTX

    BigJoeTX Bobtail Member

    27
    16
    Feb 13, 2018
    Katy TX
    0
    Say you put your foot to the floor and the truck is speeding up slowly like if you're only at 1/4 throttle.
     
    BigJoeTX, Jul 16, 2018
    BigJoeTX, Jul 16, 2018
    #3
  5. Jul 16, 2018 #4
    xsetra

    xsetra Road Train Member

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    Computer programming
     
    xsetra, Jul 16, 2018
    xsetra, Jul 16, 2018
    #4
  7. Jul 16, 2018 #5
    mrbamcclain

    mrbamcclain Light Load Member

    258
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    May 25, 2011
    Hammond, La
    0
    Check the pump pressures. Easy to verify.
    If you're turning out 60+ on an N-14 it would have grenaded long ago. Check that gauge for accuracy and make sure the sensor isn't bad. Max boost is around 38-40psi
     
    mrbamcclain, Jul 16, 2018
    mrbamcclain, Jul 16, 2018
    #5
    magoo68 and BigJoeTX Thank this.
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