84 kenworth bc350

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by frontier 1990, Nov 29, 2022.

  1. frontier 1990

    frontier 1990 Bobtail Member

    8
    7
    Nov 29, 2022
    0
    unit had injectors changed had mech set all valves had fuel pump rebuilt and checked 4 times truck turns over small amounts of white smoke took fuel line off put in clean fresh fuel pail no change , removed fuel line from fuel solenoid small amount of fuel coming out about 1/2 inch above fitting rehooked up took off return to tank slowly runs out held thumb over built preasure on return if return line off takes a total of 20 times cranking it over at intervals to fill coffee cup truck will run on ether put all back togeather sent fuel pump to differant shop put back on no change lost
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. W923

    W923 Medium Load Member

    529
    1,811
    Feb 28, 2022
    0
    What happened previously… is this truck known to run or a resurrection situation?
     
    Bean Jr. Thanks this.
  4. roundhouse

    roundhouse Road Train Member

    2,296
    5,017
    Jul 11, 2018
    0
    Make sure you don’t have a crack or something in the line from the tank to the injector pump .
    If it sucks air it won’t pull the fuel

    or you could install a lift pump to help move the fuel from the tank to the injection pump .
     
    W923 Thanks this.
  5. Star Rider

    Star Rider Medium Load Member

    364
    2,540
    Sep 23, 2019
    Michigan
    0
    do you have power to the fuel solenoid? start with the basics
     
    Last edited: Nov 30, 2022
    W923 Thanks this.
  6. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

    14,624
    220,442
    Nov 29, 2011
    West Virginia
    0
    As star rider said check the power to the solenoid…

    These pumps have a thumbscrew on the front side of the solenoid down low, turn it clockwise to override the solenoid and make sure it’s working.

    Once you screw it in the engine WILL NOT STOP until you screw it back out.

    Make sure the fuel filter is full of fuel.

    Engine should have top stop injectors, how did he set the injectors…?? Should be 0 lash on the A-B-C code…
     
    Oxbow and singlescrewshaker Thank this.
  7. BoxCarKidd

    BoxCarKidd Road Train Member

    3,925
    5,570
    Aug 26, 2014
    0
    Is the filter on the pump? If so maybe connect a hose to it and drop it in a bucket of fuel.
     
  8. frontier 1990

    frontier 1990 Bobtail Member

    8
    7
    Nov 29, 2022
    0
    yes it was running sat for 3 weeks because of injector fail just 1 but replaced all put new hose on put in bucket with new fuel and yes fuel solinoid has power sent fuel pump out to have checked again said all is very good when cranking over does not seam to put much preasure out of line on fuel solinoid like barley lifts above fitting i would have thought that at 28 psi pump preasure check it should have lifted and caused spray screwed out or in makes no differance yet new fuel solinoid
     
  9. Jubal Early Times

    Jubal Early Times Heavy Load Member

    723
    3,143
    Oct 17, 2022
    0
    Are you sure the crank on the air compressor isn’t busted or something in the accessory drive. That your pump is actually spinning.

    It’s only one of three things.
    Blockage
    Sucking air
    Not pumping
     
  10. frontier 1990

    frontier 1990 Bobtail Member

    8
    7
    Nov 29, 2022
    0
    pulled pump compressor turns over just dumped gal down hose raised higher than pump sucked it it returned to tank still just a wisp of smoke no fire going to try puting a fast system on temp to preasure up pump see what it does
     
    Jubal Early Times Thanks this.
  11. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

    14,624
    220,442
    Nov 29, 2011
    West Virginia
    0
    How are the injectors set?

    All fuel line fittings tight?

    Mechanic readjust the valves when installing the injectors? If so what are they set at? Just trying to cover all bases…

    If engine was running with that pump, and injector is only reason engine was worked on, something is for sure off.

    Were valves & injectors set using the firing order, or set using the A/B/C code…?

    Take the valve covers off and look with a flashlight and see if the push tubes are bent. Even with Jakes you should be able to look down the side of the push tubes….
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  • Draft saved Draft deleted