Cat c12 fuel problem

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by raferko, May 9, 2019.

  1. Tombstone69

    Tombstone69 Road Train Member

    1,010
    1,346
    Dec 20, 2018
    Jersey shore
    0
    Make sure you have the right voltage going to the ECM, anything less than 12v is NG. Had the same problem with my 12.7DD, oxidation on the fuses, replaced them, no problem. Just a thought.
     
    swaan Thanks this.
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. raferko

    raferko Bobtail Member

    22
    6
    Oct 23, 2018
    Japan
    0
    I get 28v to the ECM lol everything’s fine, even if it was low it wouldn’t effect mechanical fuel pressure while running, even cranking fuel pressure without an ECM even connected would give me at least 70 psi
     
  4. swaan

    swaan Road Train Member

    2,942
    4,374
    Jul 12, 2009
    BC canada
    0
    I'm sure he knows that ecm voltage doesn't effect fuel pressure. Dont be so condescending.when people are just trying to help you...... he was obviously just giving you another option that can give you the same symptoms your exsperiancing.

    28 volts you say???? Wow! That's one special electrical system you got there.

    Have you checked your suction lines yet like others have suggested??
     
    spsauerland Thanks this.
  5. raferko

    raferko Bobtail Member

    22
    6
    Oct 23, 2018
    Japan
    0
    Yes, the c12’s and c15’s I work on all run on a 24v system so we have some beefy alternators, and yes I’ve ran fuel from a bucket to bypass the tank
     
  6. Canary379

    Canary379 Light Load Member

    73
    3
    Apr 13, 2012
    Illinois
    0
    So I’m curious as too what the problem ended up being? I am having the same issue now with my engine. Thanks
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.