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  1. #1

    Default 1994 diesel hard start when hot

    Father in law has a 94 6.5 that will start everytime when cold. when very hard to start( crank and go dead), then take forever to restart. I have cummins, but need help. Thanks very much.

  2. #2


    The PMDs (pump mounted driver) usually go bad once overheated, I had to replace mine when it kept stalling. It would run fine until the truck warmed up then it sometimes stalled, ran like crap, or didnt start at all. It could be something completly different but this is common. Hope this helps Good luck
    00 Chevy k3500
    6.5 turbo Diesel
    Straight Pipe 4'' dual Exhaust
    HD Aluminium Wheels
    HID Headlights/LED Taill ights
    Airbag 5k LBS helper springs
    LED interior lights

  3. #3


    Most likely PMD matter. When it doesn't start, see if you get any smoke out the tailpipe, or crack an injector line to see it if delivering fuel. If neither, probably the PMD.
    Have You Smoked A Hemi Lately? Why, Yes I Have!
    2008 Sierra RC/SB, Iron Block 5.3L(LMG)
    , 3.42, Locking Diff, HD Cooling, HD Suspension, Towing Package.
    Raptor Stainless Steel Step Bars, Folding Tonneau Cover, DiabloSport Predator

  4. #4


    Hard starting only when the engine is hot is a sign that the head and rotor inside the IP is worn.... Time for a new IP...

    Airforce Veteran (7 years)

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