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wbrowning's avatar
wbrowning
Explorer
Apr 25, 2016

99 Chieftain 5.9 Cummins wont stay runing

Engine was running with reduced power so I changed filters it seemed to not be picking up fuel so I changed lift pump same thing if I get system primed it will run for a few minutes then die if you pull filter not on engine it is not full it acts like it wont pick up fuel from tank it has 3/4 does the supply line just go into tank or does it have some type of screen on the end can I blow air down the line.
Class A
  • wbrowning's avatar
    wbrowning
    Explorer
    Apr 27, 2016
    Here is the update I blew fuel line out back to tank replaced sediment bowl on first filter primed the system and it will stay running now.
  • wbrowning's avatar
    wbrowning
    Explorer
    Apr 26, 2016
    Yes I have the same thing I'm going to start again today I just have to take care of a few other things I will up date.
  • MrWizard's avatar
    MrWizard
    Moderator
    Apr 26, 2016
    wbrowning wrote:
    I hope some body can come up with a diagram of the fuel system I do not believe it has a priming pump.


    is that a B series 5.9L with mechanical injectors ?

    here is the fuel drawing for my 95 series B 5.9

    MrWizard wrote:

    on these old engines
    according to the manual , I have an "inline injection pump"

    and the drawing labels some little thing at the bottom of the engine as the lift pump

    the inline injection pump has the fuel manifold fittings ( fuel rail ? ) on top





    #3 is the lift pump

    #8 is the injection pump

    #10 fuel injection manifold


    any way this 'injection pump' is the expensive part,
  • path1's avatar
    path1
    Explorer
    Apr 26, 2016
    What is your fuel pressure?

    If none or low after checking gaskets and for sucking air... then read this link, might be handy for you.

    http://www.bluechipdiesel.com/vp44_diagnostics.html

    I put a ton of money into my 01 3/4 ton last month. Had to have everything done for me because the park I'm in wouldn't let me drop fuel tank. Which I don't blame them. But $$$ sure added up and shop did not do that good of job. Better off doing it yourself if you can.
  • Matt_Colie's avatar
    Matt_Colie
    Explorer II
    Apr 26, 2016
    I am a ship's engineer and have been a diesel guy forever (even before the license). What you are seeing is guaranteed to be an air leak in the fuel system before the lift pump. You say you changed the lift pump and some filters? Well, take it apart again and look for the poorly fit fuel line or the wrinkled gasket. If that low pressure side isn't perfect, it won't work...

    Matt
  • wbrowning's avatar
    wbrowning
    Explorer
    Apr 25, 2016
    I will look at the fuel drain valve on the side of filter housing on side of engine.
  • horizon36's avatar
    horizon36
    Explorer
    Apr 25, 2016
    Punctuation is very important as illustrated below:
    Lets eat kids
    Lets eat, kids

    Can't help with the engine, just the punctuation.
  • wbrowning's avatar
    wbrowning
    Explorer
    Apr 25, 2016
    I hope some body can come up with a diagram of the fuel system I do not believe it has a priming pump.

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