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N14 Celect + Fuel Issue

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Steve2454, Jan 14, 2026.

  1. Jan 14, 2026 #1
    Steve2454

    Steve2454 Bobtail Member

    10
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    Dec 29, 2023
    0
    Hello guys,
    I have a 99 Peterbilt 379 with an N14 Celect + in it. I have been having fuel problems for the past month that I have been unable to resolve. The truck will run perfectly fine all day but when I shut it off and immediately try to restart it, it will not start, I have to give it a shot of starting fluid. I have gone thru 7 Donaldson fuel filters and I believe I have the correct type (P551000 & P551311). I know the engine side filter has to have the tube in the filter so it draws from the bottom. Twice after changing filter the truck ran flawless for a few days then the starting issue started happening again. I replaced the check valve at the cooling plate and have inspected it a few times as well. No fuel leaks anywhere either. Any suggestions would be appreciated.
     
    Steve2454, Jan 14, 2026
    Steve2454, Jan 14, 2026
    #1
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  3. Jan 14, 2026 #2
    DUNE-T

    DUNE-T Road Train Member

    7,031
    17,104
    May 10, 2015
    Detroit, MI
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    Are you sure it's fuel? Any ECM codes?
     
    DUNE-T, Jan 14, 2026
    DUNE-T, Jan 14, 2026
    #2
  4. Jan 14, 2026 #3
    xsetra

    xsetra Road Train Member

    5,190
    7,137
    Aug 21, 2011
    0
    Not sure what tube you are talking about.
    I had the spin on type that went on the fuel pump. Spin on type that went on remote bracket with fuel line from tanks then went to the fuel pump. I used a FS1000 filter. Also had the Davco filter system.

    When you change the spin on filter make sure you remove the old O-ring. This has caused a loss of prime. Another problem was the cooling plate had a pin hole leak.

    Do you need starting fluid to start every time? What are the conditions to start truck without starting fluid.
     
    xsetra, Jan 14, 2026
    xsetra, Jan 14, 2026
    #3
  5. Jan 17, 2026 #4
    Steve2454

    Steve2454 Bobtail Member

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    Dec 29, 2023
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    We figured it out. It was a bad camshaft/crankshaft position sensor.
     

    Attached Files:

    Steve2454, Jan 17, 2026
    Steve2454, Jan 17, 2026
    #4
    IH9300SBA and xsetra Thank this.
  7. Jan 17, 2026 #5
    IH9300SBA

    IH9300SBA Road Train Member

    2,423
    23,845
    Feb 26, 2021
    0
    My recent experience with (3) Donaldson P551000, they all sucked air. I would buy a case at a time and I'm not sure what the deal was, but every one out of that case would cause me issues. Switch to Fleetguard FS1000 or CAT 256-8753 and problem immediately solved.
     
    IH9300SBA, Jan 17, 2026
    IH9300SBA, Jan 17, 2026
    #5
    Steve2454 Thanks this.
  8. Jan 17, 2026 #6
    Steve2454

    Steve2454 Bobtail Member

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    Dec 29, 2023
    0
    I am switching to Fleetguard filters
     
    Steve2454, Jan 17, 2026
    Steve2454, Jan 17, 2026
    #6
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