Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

Hard start

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Ted Holcombe, Apr 12, 2017.

Page 1 of 2
  1. Apr 12, 2017 #1
    Ted Holcombe

    Ted Holcombe Bobtail Member

    3
    0
    Apr 12, 2017
    0
    I have a 1993 Freightliner Condor with a detroit 12-7. I'm having trouble starting it after some 12 to 14 hours of being shut down. Have to prime it with gasoline in the intake manifold to start. Have changed the return check and come back to the same situation. Other than that, it runs smooth on idle and has lots of power. Fuel filters are clean. Any ideas ??
     
    Ted Holcombe, Apr 12, 2017
    Ted Holcombe, Apr 12, 2017
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. Apr 12, 2017 #2
    gokiddogo

    gokiddogo Road Train Member

    8,786
    14,769
    Mar 5, 2012
    Ontario Canada
    0
    Don't shut it off..?

    Try the garage. Maybe mods can move this for you...
     
    gokiddogo, Apr 12, 2017
    gokiddogo, Apr 12, 2017
    #2
    Ted Holcombe and G13Tomcat Thank this.
  4. Apr 12, 2017 #3
    Heavyd

    Heavyd Road Train Member

    7,812
    6,265
    Feb 4, 2009
    0
    Usually the check valve at the back of the head fixes this 90% of the time.
     
    Heavyd, Apr 12, 2017
    Heavyd, Apr 12, 2017
    #3
    Ezrider_48501, Ted Holcombe and BUMBACLADWAR Thank this.
  5. Apr 12, 2017 #4
    BoxCarKidd

    BoxCarKidd Road Train Member

    4,525
    6,586
    Aug 26, 2014
    0
    Search block top right. Lots of info on that topic.
     
    BoxCarKidd, Apr 12, 2017
    BoxCarKidd, Apr 12, 2017
    #4
    Ted Holcombe Thanks this.
  7. Apr 12, 2017 #5
    Jace379

    Jace379 Light Load Member

    146
    97
    Mar 6, 2017
    0
    It's one of two things on a Detroit, check valve at back of head or fuel pump that's behind the compressor. I've seen fuel drain back both ways. Also there's better ways to prime a Detroit then gas
     
    Jace379, Apr 12, 2017
    Jace379, Apr 12, 2017
    #5
    chalupa Thanks this.
  8. Apr 12, 2017 #6
    chalupa

    chalupa Road Train Member

    3,757
    1,643
    Jul 22, 2010
    Houston,Texas
    0
    No kidding! good way to blow the head right off that thing. I remember using a gas rag over the air cleaner on wore out 2 cycles AND we built fires under the engines in Alaska but I don't recall ever sloshing them with raw gas.
     
    chalupa, Apr 12, 2017
    chalupa, Apr 12, 2017
    #6
    Ted Holcombe Thanks this.
  9. Apr 14, 2017 #7
    Ted Holcombe

    Ted Holcombe Bobtail Member

    3
    0
    Apr 12, 2017
    0
    Jace, I know priming it with gasoline is dangerous, but how else can I fire it up if it doesn't have diesel in the line? It eats up the batteries (and they are new). As I said in my first post, the valve at the back of the head is new. How can I check to see if it's draining back through the fuel pump. I don't see any check valves there. And how else can I prime this engine?
     
    Ted Holcombe, Apr 14, 2017
    Ted Holcombe, Apr 14, 2017
    #7
  10. Apr 14, 2017 #8
    Smellfunny

    Smellfunny Road Train Member

    1,446
    967
    Jan 28, 2012
    South Carolina
    0
    It only does it after being shut off for a while?
    One place I have seen issues with is the two fittings that go into the fuel pump. I have seen one of them have a hair line crack and cause loss of prime but show no leak. Is your return line directly in head or have a short run of line and then check valve? You could have an injector or more that is leaking down as well.
     
    Smellfunny, Apr 14, 2017
    Smellfunny, Apr 14, 2017
    #8
  11. Apr 14, 2017 #9
    Ted Holcombe

    Ted Holcombe Bobtail Member

    3
    0
    Apr 12, 2017
    0
    Thanks for your input. Now, can anyone tell me how to prime the engine so it will start without having to use a little gasoline (I use about a 1/2 an ounce directlyu into the intake maniforl) ?? I certainly don't wsant to blow the head off
     
    Ted Holcombe, Apr 14, 2017
    Ted Holcombe, Apr 14, 2017
    #9
  12. Apr 16, 2017 #10
    barroll

    barroll Road Train Member

    1,096
    544
    Nov 23, 2010
    Southwest Michigan
    0
    Crack the fuel line, plug the fuel tank vent, and pressurize the fuel tank with compressed air until fuel comes out the line.
     
    barroll, Apr 16, 2017
    barroll, Apr 16, 2017
    #10
    Ted Holcombe Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

    • Page 1 of 2