06 c15 acert crank no start problems

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Jaydooley, Feb 23, 2024.

  1. Jaydooley

    Jaydooley Bobtail Member

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    Dec 10, 2022
    0
    I've been lurking awhile, reading old threads and can't find an answer. 06 379 with a c15 twin turbo. Won't crank without a shot of ether, or roll it off. runs fine after you get it going. Builds 40 pounds of boost bobtail wide open. I've exhausted every thing I can think of short of going to cat or Peterbilt. So far I've ruled out the following
    Crank sensor
    Cam sensor
    Starter
    Batteries
    Fuel filters
    Both fuel filter bases
    Getting power to plug 70 on ecm connector from key input
    Checked ecm grounds
    Constant power from battery to ecm checks out (was missing a pin that was supposed to be 12v +. It's never had it. I think it was 57 or 67.
    New transfer pump
    New check valve in secondary filter base
    New hand primer/gasket.

    Today, I rigged a gauge into the secondary housing and I get 60 pounds fuel pressure at idle, 75-80 at 1400rpm, and 115 at idle with return line capped. No more than 25 during cranking. How much cranking fuel pressure do these need to fire?
     
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  3. zinita17601

    zinita17601 Road Train Member

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    Aug 19, 2010
    lancaster pa
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    Last edited: Feb 24, 2024
  4. zinita17601

    zinita17601 Road Train Member

    1,274
    1,519
    Aug 19, 2010
    lancaster pa
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    crank the truck with clean diesel directly from a bucket and c if the problem persists
     
  5. MRMTRANS

    MRMTRANS Light Load Member

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    Apr 28, 2015
    0
    You don't have fuel lines listed.
     
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