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2009 Ram 2500 6.7 Diesel hesitating

Discussion in 'Engine and Performance' started by Paul Millar, Oct 31, 2019.

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  1. Paul Millar

    Paul Millar Junior Member

    Posts:
    2
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    Joined:
    Oct 28, 2019
    Location:
    Calgary, AB Canada
    Ram Year:
    2009
    Engine:
    6.7l Cummins Turbo Diesel
    Had this problem for a while now, several garages have looked at it, two of them diesel specific garages and nobody is able to pinpoint it.

    Problem is that when it is cold (typically below 0 deg C) or a bit damp out the truck will hesitate until it is somewhat warm. Usually for about 5 minutes or so when you give it gas it sputters a bit, hesitates and does not seem to have full power range. It feels like slight fuel starvation.

    Obvious stuff... Changed the fuel filter, air filter, filter on the manifold, had the ECM intake cleaned and de-carboned. They have had it on the computer multiple times and it does not appear to throw codes.

    When it is warmer weather it runs like a top. Obviously from my post i am not a diesel mechanic but one would think the garage would be able to nail it down. Still looking for answers, my latest google had me looking at lift pump solutions??

    thx in advance for any assistance guys.
     
  2. mtnrider

    mtnrider Senior Member

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    Joined:
    Sep 25, 2014
    Location:
    Georgia
    Ram Year:
    2016
    Engine:
    6.7 Cummins
    One thing that comes to mind is injectors. Are you getting any white smoke at start up?


    .
     
  3. Paul Millar

    Paul Millar Junior Member

    Posts:
    2
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    Joined:
    Oct 28, 2019
    Location:
    Calgary, AB Canada
    Ram Year:
    2009
    Engine:
    6.7l Cummins Turbo Diesel
    Nothing at all, it runs super clean
     
  4. Dennis Shellito

    Dennis Shellito Member

    Age:
    68
    Posts:
    75
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    Joined:
    Dec 17, 2018
    Location:
    Ft. Morgan, CO
    Ram Year:
    2012
    Engine:
    Cummins IBS
    I am not suggesting you replace anything, but do you have a fuel rail pressure gauge? I wonder if the engine is starving for fuel when it does this hesitation? It could be something as simple as the fuel pressure regulator or the fuel pressure sensor. I don't know how to test these parts but I would think a modern diesel garage could sort it out........but as you have posted, perhaps not.
     

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