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03 pete 379 Help needed

Discussion in 'Trucks [ Eighteen Wheelers ]' started by dunctrk379, Jul 12, 2011.

Page 1 of 3
  1. Jul 12, 2011 #1
    dunctrk379

    dunctrk379 Light Load Member

    213
    11
    Jul 12, 2011
    lowndesboro,al
    0
    I have bought a 379 with c15, 10spd, 3.70 rears. I has low boost and high egts grossing 88k. I pulls strong up 1500 rpms and after that it falls on it face. When I push the throttle to make it turn above 1500 it like the throttle is useless. I have had it since the 10th of june and the check engine came up two weeks ago and went off and today on the way home it came back and stayed on. Any help from anyone that knows would be greatly appreciated
     
    dunctrk379, Jul 12, 2011
    dunctrk379, Jul 12, 2011
    #1
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  3. Jul 12, 2011 #2
    sandman1976

    sandman1976 Medium Load Member

    411
    47
    Mar 5, 2009
    burgaw,nc
    0
    you need to check your hoses to your air cooler,clamps on turbo,fuel filter air filter,manifold and air cooler for leaks. go to dealer and have them pull the codes,then ask some techs on here for advice.
     
    sandman1976, Jul 12, 2011
    sandman1976, Jul 12, 2011
    #2
  4. Jul 12, 2011 #3
    pbr

    pbr Bobtail Member

    9
    1
    Jun 21, 2011
    hickory, nc
    0
    sounds like you have a bridge engine. does your engine serial number start with mbn? If so, the best thing you can do get rid of the catalytic converters and have the computer reprogrammed with a 6nz file.
     
    pbr, Jul 12, 2011
    pbr, Jul 12, 2011
    #3
  5. Jul 13, 2011 #4
    Mr. Haney

    Mr. Haney Road Train Member

    2,693
    2,041
    Dec 17, 2008
    0
    You can get the flash fault code from the ECM using your cruise control switches.

    Turn the ignition key to the ON position, the engine doesn't have to be running, just the key to the ON position


    The ON/OFF Cruise Control switch leave it in the OFF position.

    The SET/RESUME Switch hold down to the Resume position for 3 seconds. Your Check Engine Light will start flashing once you've released the Resume Swith, count the flashes.

    It will flash from 1 to 9 times and then pause for a second and flash again 1 to 9 times.

    Lets say it flashed 5 times and paused and then flashes another 5 times this is Code 55 and means at the current time there are no Stored Fault Codes in the ECM.

    If it flashed 4 times and paused then flashed 2 times this would be Code 42 this is a Timing Sensor Calibration Fault Code.

    We need the Engine Serial Number and the Fault Code to help you.
     
    Mr. Haney, Jul 13, 2011
    Mr. Haney, Jul 13, 2011
    #4
    rjones56 and 123456 Thank this.
  7. Jul 13, 2011 #5
    dunctrk379

    dunctrk379 Light Load Member

    213
    11
    Jul 12, 2011
    lowndesboro,al
    0
    Thanks everybody for you help it is at the shop now for code reading and to find out what it can be turned up to after fixing whats wrong with it. When I get it back it will keep it posted of what was wrong
     
    dunctrk379, Jul 13, 2011
    dunctrk379, Jul 13, 2011
    #5
  8. Jul 13, 2011 #6
    Mr. Haney

    Mr. Haney Road Train Member

    2,693
    2,041
    Dec 17, 2008
    0
    If it's a MBN C-15, the highest it will be able to be uprated is 525 Hp. The dealer will not want tp uprate it this high if the transmission isn't rated for 1850 lb-ft of torque. If it's a 6NZ C-15 you'll be able to uprate to a 550 if the transmission is rated for 1850 lb-ft of torque.

    If it's an MBN you don't want the dealer uprating with a MBN flash file, otherwise you'll still have the poor fuel mileage and throttle response of the MBN programming. You need to uprate with either a 6NZ or 7CZ file for good fuel mileage and performance

    PM me if you'd like to do this, because the dealer can't
     
    Mr. Haney, Jul 13, 2011
    Mr. Haney, Jul 13, 2011
    #6
  9. Jul 13, 2011 #7
    Jfaulk99

    Jfaulk99 Road Train Member

    2,914
    1,652
    May 16, 2009
    Couch
    0
    Like Mr.Haney said DO NOT pay the dealer to uprate, especially if it's an MBN. I've been down that road, it costs a fortune and WILL NOT run any better. Talk to Mr.Haney he'll make it run.
     
    Jfaulk99, Jul 13, 2011
    Jfaulk99, Jul 13, 2011
    #7
  10. Jul 15, 2011 #8
    dunctrk379

    dunctrk379 Light Load Member

    213
    11
    Jul 12, 2011
    lowndesboro,al
    0
    Got my truck back today and the crank speed sensor had a broken wire going to it and boost line had hole in it
     
    dunctrk379, Jul 15, 2011
    dunctrk379, Jul 15, 2011
    #8
  11. Jul 22, 2011 #9
    dunctrk379

    dunctrk379 Light Load Member

    213
    11
    Jul 12, 2011
    lowndesboro,al
    0
    I have pulled the exhaust away from the turbo and it looks like new on the inside it seems the turbo has been replaced since the truck was new.
     
    dunctrk379, Jul 22, 2011
    dunctrk379, Jul 22, 2011
    #9
  12. Jul 22, 2011 #10
    Jfaulk99

    Jfaulk99 Road Train Member

    2,914
    1,652
    May 16, 2009
    Couch
    0
    Look at the tag on the center section. If it's been replaced it will most likely say "remanufactured"
     
    Jfaulk99, Jul 22, 2011
    Jfaulk99, Jul 22, 2011
    #10
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