Cat C-15 6NZ starting issue

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Galves10, Feb 29, 2020.

  1. Galves10

    Galves10 Bobtail Member

    1
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    Feb 25, 2020
    0
    I’m having an issue with my c15 6nz engine.
    Engine only turns on when using starting fluid. Then after that if runs great, but if I turn it off and try turning it back on it will only crank but not start until I spray it with starting fluid again.

    could it be a sensor? And if you which one
     
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  3. swaan

    swaan Road Train Member

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    Jul 12, 2009
    BC canada
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    Check valve in filter head. Takes a 1" wrench .
    Take out and replace with a new one.

    Don't mistake it for the pressure regulator as they look the same and take the same 1" wrench to take out
     
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  4. Chubby Fly

    Chubby Fly Medium Load Member

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    Nov 25, 2019
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    possible causes. FUel regulator as mentioned, fuel primer bad diaghram, bad secondary housing, bad fuel pump not holding pressure and bleeding back to tank when truck shuts off.
     
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