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Fuel shortage at Half tank, 2015 cummins

Discussion in '6.7 Common Rail' started by cash4acres, May 14, 2020.

  1. cash4acres

    cash4acres Senior Member

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    IMG_20200512_163118634.jpg I have a problem when my 2015 Ram Cummins Truck reaches half tank fuel the delivery of fuel to the engine becomes sporadic sometimes the engine dies at 1/4 to 3/8 tank sometimes while I'm driving the fuel rail pressure drops to 1-2k and that's bad

    what is causing this? the pump in the tank? pump CP3? or filters?

    I have changed at 5 and 3 thousand miles front and back filters.

    truck runs so smooth with zero vibration when tank is full to half full. Help help help

    I'm the guy that gets 25-33 MPGs freeway.
     
  2. mtnrider

    mtnrider Senior Member

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    I would start with the simple stuff first. Almost sounds like a venting issue? There should be a tube that runs up and is tie strapped to the filler neck (behind the side panel). I would check and make sure it isn't clogged.

    Unless you are getting extremely dirty fuel those filters should be good for a long time. I change mine when the display says to change them which is about every 15K miles
    .
     
  3. crash68

    crash68 Senior Member

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    He could stick a screwdriver or something to hold both flaps in the filler open to see if the problem goes away, that would eliminate a venting issue.
    If the problem starts happening near a quarter tank, there might be something wrong with the lift pump pick up.
     
  4. cash4acres

    cash4acres Senior Member

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    Good ideas.
     
  5. Sandevino

    Sandevino Senior Member

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    I once had a fuel pressure sensor flake out. Check filters, check lines, etc..
     
  6. Dennis Shellito

    Dennis Shellito Member

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    I think it is either the fuel pressure regulator or the fuel pickup/ lift pump in the fuel tank. I have heard of both of these issues causing this problem.
     
  7. cash4acres

    cash4acres Senior Member

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    P0087. Towed to Stealership. Good I have a cp3 with me. 35k new. Labor quote Monday.

    To get your injector pump replaced, you are looking at anywhere from $1,400 to $1,875. For labor, you should pay between $770 and $1,000, while parts will run between $685 and $900
     
  8. cash4acres

    cash4acres Senior Member

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    Fuel pump in tank died
     

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