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Cummins ISX wont start

Discussion in 'Trucks [ Eighteen Wheelers ]' started by zaheerkarim, May 17, 2014.

Page 1 of 2
  1. May 17, 2014 #1
    zaheerkarim

    zaheerkarim Light Load Member

    73
    3
    Jun 21, 2011
    Malawi
    0
    Hi,

    I have a problem with my Freightliner FLD with a Cummins ISX. It will start for a few minutes until the diesel in the filter is finished then cut off. Once i fill up the filter again it will start and cut off again once the fuel is finished. But when i disconnect the fuel lines and put them into a gallon/container of diesel it will start and run very well. It wont misfire or cut off. But once i connect the pipes back to the tank it will only start for a few mins. I have checked the pipes for leaks but the don't seem to leak or have any hole on them.

    Any help will be appreciated.
     
    zaheerkarim, May 17, 2014
    zaheerkarim, May 17, 2014
    #1
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  3. May 17, 2014 #2
    baha

    baha Road Train Member

    4,137
    2,837
    Jul 25, 2013
    ga
    0
    CK. fuel valve at inlet line on filter that keeps the fuel from running back when eng. is off, it may/be pluged ?
     
    baha, May 17, 2014
    baha, May 17, 2014
    #2
  4. May 17, 2014 #3
    zaheerkarim

    zaheerkarim Light Load Member

    73
    3
    Jun 21, 2011
    Malawi
    0
    I have to check that
     
    zaheerkarim, May 17, 2014
    zaheerkarim, May 17, 2014
    #3
  5. May 17, 2014 #4
    Heavyd

    Heavyd Road Train Member

    7,812
    6,265
    Feb 4, 2009
    0
    The suction fuel line(s) from the tank(s) has a hole in it and it is sucking air, or the pick up tube inside the tank is cracked or broken. If your truck is a little older, I would suspect the lines have some dry rot and they are sucking air.
     
    Heavyd, May 17, 2014
    Heavyd, May 17, 2014
    #4
  7. May 17, 2014 #5
    freightrunner

    freightrunner Heavy Load Member

    722
    182
    Mar 25, 2012
    Georgia
    0
    Check valve I had the same problem..
     
    freightrunner, May 17, 2014
    freightrunner, May 17, 2014
    #5
  8. May 18, 2014 #6
    Red Rocket 1964

    Red Rocket 1964 Light Load Member

    115
    44
    Jan 31, 2013
    0
    ISX should have a lift pump. do you hear it running?
     
    Red Rocket 1964, May 18, 2014
    Red Rocket 1964, May 18, 2014
    #6
  9. May 18, 2014 #7
    Heavyd

    Heavyd Road Train Member

    7,812
    6,265
    Feb 4, 2009
    0
    How do you explain why his engine stays running if he runs a fuel line from a bucket?
     
    Heavyd, May 18, 2014
    Heavyd, May 18, 2014
    #7
    baha Thanks this.
  10. May 18, 2014 #8
    freightrunner

    freightrunner Heavy Load Member

    722
    182
    Mar 25, 2012
    Georgia
    0
    The fuel doesn't leak out. It stays running opposed to when the fuel in the bowl leaks out the truck shuts off.
     
    freightrunner, May 18, 2014
    freightrunner, May 18, 2014
    #8
  11. May 18, 2014 #9
    rank

    rank Road Train Member

    9,919
    113,508
    Feb 11, 2010
    50 miles north of Rochester, NY
    0
    What year is your truck? We had a similar situation with our 2008 T660. I forget the details but IIRC it would fire off the funnel but not when we connected the lines back up. Turns out the batteries were a little bit low on charge. They were good enough to crank but not good enough to run the fuel pump. You need something like 12.0 v to run the pump or something.

    Try charging up the batteries.
     
    rank, May 18, 2014
    rank, May 18, 2014
    #9
  12. May 18, 2014 #10
    zaheerkarim

    zaheerkarim Light Load Member

    73
    3
    Jun 21, 2011
    Malawi
    0
    I will check the valve first. I guess it if it was a pipe it wouldn't start and run with fuel from a container/bucket. When the ignition is switched on the pump can be heard. But once fuel lines are connected to the tank it wont start or it may start and cut off within a few seconds.
     
    zaheerkarim, May 18, 2014
    zaheerkarim, May 18, 2014
    #10
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