379 with a cat wont start

Discussion in 'Peterbilt Forum' started by dgc, Dec 15, 2013.

  1. dgc

    dgc Light Load Member

    Dec 2, 2012
    miami, fl
    i have an 02 379 with a 6nz. I got to my delivery backed in the door and when i got the green light the truck wont start, It turns over just doesn't start... Has fuel, all the fluids are filled. I checked with the cruise control to see if there were any codes, but the check engine light wont even turn on.....I was told by the driver next to me that the starter probably has a short and its not letting the ecm get any juice. Has anyone heard of this.

    I did have problems last night when i went to park, when i turned on the turning signals the dashboard lights, were flashing and when i put the hazards on they just stayed on and didnt flash... but this morning everything was fine

    Any ideas?
  2. baha

    baha Road Train Member

    Jul 25, 2013
    ck. fuse at batt and in fuse box.
    dgc Thanks this.
  3. Smaggs

    Smaggs Pie Crust

    Apr 12, 2011
    Pittsburgh, PA
    Fuel filter
    dgc Thanks this.
  4. dgc

    dgc Light Load Member

    Dec 2, 2012
    miami, fl
    just did a pm about 2k miles ago.. but will give it a shot
  5. Boka

    Boka Light Load Member

    Nov 6, 2012
    What is your voltage?
    dgc Thanks this.
  6. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

    Jan 20, 2010
    Hesperia, Ca.
    Timing sensor in top front of the cam gear might be bad.
    Spray some starting fluid in the air cleaners.
    baha and dgc Thank this.
  7. Richter

    Richter Road Train Member

    Feb 13, 2012
    Philadelphia Pa
    check your batts...i mean everything that goes wrong on a truck is fuel related, but this sounds light a short especially if you were having batt problems. Check the connection to the bats and see if any wire is bare. Look underneath for any bare or exposed wire. Does turning your light on or off while cranking make a difference?
    dgc Thanks this.
  8. kwcam

    kwcam Light Load Member

    Dec 29, 2012
    at the shop
    If the check engine light doesn't come on it could be a bad ignition relay, this is common with the KW, so would be an easy check, just swap it with the accessory relay in your fuse panel, also check the 5 amp ecm fuse while in there.
    dgc Thanks this.
  9. d281833

    d281833 Medium Load Member

    May 15, 2012
    Check the wire at the transfer pump? Might not be supplying fuel.
    dgc Thanks this.
  10. WorldofTransportation

    WorldofTransportation Heavy Load Member

    Sep 20, 2009
    Your mother
    When you say it turns over.. does it turn over 1 time or keep turning over like it is not getting fuel? I know on my old pete I had there was a solenoid on the firewall by the brake valve (the footvalve the one with all the colored lines on it) and you could make a jumper wire to touch don't connect it.. and it would bypass the ignition .. but if you do this don't leave it touching both sides.. told a guy to do this last month and he did .. Truck started and he burned his starter up and almost caught the truck on fire...
    dgc Thanks this.
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