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She quit running

Discussion in 'GM 6.5 Diesel Engines' started by 94 6.5 3500HD, Jun 12, 2008.

  1. 94 6.5 3500HD

    94 6.5 3500HD New Member

    13
    0
    May 31, 2008
    Burlington CT
    Well after running beautifully for me for almost a year, she quit running suddenly like it ran out of fuel. I ran and got 10 gallons and poured it in. No dice. Cracked an inj line, no fuel on cranking. I've been meaning to put a new lift pump in it for piece of mind, so i did. No dice. I think the last one was shot because the new one is alot noisier. I got it to fire and run well for 5-10 seconds on a small shot of starting fluid. (bad I know). Still no fuel coming out when i crack a line, bt it does flow out of the filter thingy. I installed a Heath kit when I bought it (chip, tm, new pmd in the bumper). Obviously the inj pump isn't pumping, but I'm not sure where to look next. Any help is much appreciated, I'm off to cruise for some more info.....Jason in CT
     
  2. DEERE3594

    DEERE3594 I welcome everyone...not just Penguins!

    5,009
    1
    May 5, 2008
    NE Ohio
    This is hurting my head thinking about it and not sure what to say..
    How old is your IP? Was iit running good before hand?
     
  3. NVW

    NVW Well-Known Member

    7,522
    170
    May 5, 2008
    Castor, AB.
    Sounds like you have fuel to the IP but not to the injectors. Check the fuel shut off sol. fuse as well as the ECM fuse to rule those out. Check the grounds as well. I would also check the ext. to the FSD. Does the fuel sol. click when the ign. is turned on? Leo
     
  4. JMJNet

    JMJNet Recruit

    1,799
    30
    May 6, 2008
    Richardson, TX
    Have you checked your OPS? I know it is new LP.
     
  5. 94 6.5 3500HD

    94 6.5 3500HD New Member

    13
    0
    May 31, 2008
    Burlington CT
    I'll check fuses today. How do I check the function of the OPS. (not sure where its located either)?
     
  6. 94 6.5 3500HD

    94 6.5 3500HD New Member

    13
    0
    May 31, 2008
    Burlington CT
    Not sure how old the IP is. I have a spare, but not sure how to rule this one dead..
     
  7. JMJNet

    JMJNet Recruit

    1,799
    30
    May 6, 2008
    Richardson, TX
    Jump the LP to see if the pump running and getting fuel out of your t-valve without OPS. If the LP runs and fuel out when jump, then LP is good.

    Then, measure the voltage at the connector to the LP down under the driver on the frame. You have to check it with ign key "on". If there is no voltage, then OPS is bad.

    OPS is located underneath the Glow Plug relay toward the driver side from the Fuel filter (very close to the firewall). At least that is where mine is on 95. IIRC, yours should be the same for 94. 96+ is under the intake manifold.
     
  8. Turbine Doc

    Turbine Doc Just Another Diesel Guy

    Since yours is OBD-I you can jumper at diagnostic port and power your lift pump
     

    Attached Files:

  9. 94 6.5 3500HD

    94 6.5 3500HD New Member

    13
    0
    May 31, 2008
    Burlington CT
    Not sure what the pic is showing. ( I apologize but I'm new to this stuff)
     
  10. DIYORPAY

    DIYORPAY New Member

    98
    0
    Jun 13, 2008
    What he is trying to say is that the PIN G on your diagnostic port(located under dash, below steering column) is connected directly to your lift pump. Putting 12 v 's to that port will power your lift pump. You should hear it running and get fuel out of the T-valve.
     

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