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Cummins n14

Discussion in 'Ask An Owner Operator' started by Fld1201994, Jul 22, 2021.

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  1. Jul 22, 2021 #1
    Fld1201994

    Fld1201994 Bobtail Member

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    Hello fellas, I have a Cummins n14 that when I go to start it up it’s start but then after 2 to 3 seconds it dies , then I go ahead and try again to started up and it cranks for a bit then starts liked if I had sprayed some started fluid and stay on with no problem …. Now a few days ago it started acting like if it was running out of fuel with a lot of white smoke and it wouldn’t rev up but that only lasted like 40 seconds to a minutes at the most then ran fine afterwards , any thoughts? Thanks for your time fellas
     
    Fld1201994, Jul 22, 2021
    Fld1201994, Jul 22, 2021
    #1
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  3. Jul 22, 2021 #2
    Brettj3876

    Brettj3876 Road Train Member

    11,257
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    Land of local
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    restriction in the fuel somewhere?
     
    Brettj3876, Jul 22, 2021
    Brettj3876, Jul 22, 2021
    #2
    Dino soar and Fld1201994 Thank this.
  4. Jul 22, 2021 #3
    sbaumann14

    sbaumann14 Road Train Member

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    Do u have the Davco filter? Sounds like ur loosing prime. There’s a check ball in the bottom of filter housing that keeps the fuel from running back into ur tank when u sit. They wear out
     
    sbaumann14, Jul 22, 2021
    sbaumann14, Jul 22, 2021
    #3
    Fld1201994 Thanks this.
  5. Jul 22, 2021 #4
    Fld1201994

    Fld1201994 Bobtail Member

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    The filter housing that I have its connected straight to fuel pump with the fs1000 fuel filter , I replaced the check valve that goes on the ecm cooling plate liked 2 years ago , I’ll go ahead and tried replacing it again.
     
    Fld1201994, Jul 22, 2021
    Fld1201994, Jul 22, 2021
    #4
  7. Jul 22, 2021 #5
    bad-luck

    bad-luck Road Train Member

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    Baltimore, Maryland
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    Change the fuel filter first. Go from there.
     
    bad-luck, Jul 22, 2021
    bad-luck, Jul 22, 2021
    #5
    Fld1201994 Thanks this.
  8. Jul 22, 2021 #6
    Dino soar

    Dino soar Road Train Member

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    I'm not saying this is your problem but on older trucks sometimes the fuel lines themselves can internally collapse.

    Sometimes that can happen in such a way that as the fuel really starts to get flowing it shuts itself off.

    I would try running fuel directly out of a bucket to the pump to isolate whether you have a problem before the pump or after the pump.

    That's how I do it on the big cam anyway. I assume you can do the same thing on the electronic engine.
     
    Last edited: Jul 22, 2021
    Dino soar, Jul 22, 2021
    Dino soar, Jul 22, 2021
    #6
    spindrift, jamespmack and Fld1201994 Thank this.
  9. Jul 22, 2021 #7
    Fld1201994

    Fld1201994 Bobtail Member

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    I just replaced the filter and it’s the same
     
    Fld1201994, Jul 22, 2021
    Fld1201994, Jul 22, 2021
    #7
  10. Jul 22, 2021 #8
    Fld1201994

    Fld1201994 Bobtail Member

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    That is what I was thinking, because I might be wrong but I believed that the fuel lines on the truck there original
     
    Fld1201994, Jul 22, 2021
    Fld1201994, Jul 22, 2021
    #8
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  11. Jul 22, 2021 #9
    abyliks

    abyliks Road Train Member

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    ludlow MA
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    Cam sensor could be on its way out to, I carry a spare under my bunk
     
    abyliks, Jul 22, 2021
    abyliks, Jul 22, 2021
    #9
    jsnell, ChevyCam and Fld1201994 Thank this.
  12. Jul 22, 2021 #10
    bad-luck

    bad-luck Road Train Member

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    Baltimore, Maryland
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    Ok, it sounds like you may have a cracked fuel line, and are sucking air.
     
    bad-luck, Jul 22, 2021
    bad-luck, Jul 22, 2021
    #10
    Fld1201994 Thanks this.
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