12.7 Detroit need a new turbo (upgrade?), hauling light and best mpg?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Green461, Mar 24, 2020.

  1. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    FYI, that oil in the ECM can wreck it if left alone. It's coming from your injector harness. Oil can actually travel down the inside of the wire and into the ecm.

    See it fairly often where an ECM is 1/2 full of oil.

    Swap that injector harness ASAP
     
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  3. DUNE-T

    DUNE-T Road Train Member

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    It looks to me like it's coming from the seal though.
     
  4. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    I don't doubt that the cam seal and thrust plate o ring are leaking, but it's almost impossible for oil to get into the ecm from outside. The seals are very good.

    Pull your two injector harness plugs, white and black on the front of the ecm, and see if there is oil in them.

    I've never seen an oil leak cause oil to get into the ecm. Injector harness leaks are very common.
     
  5. DUNE-T

    DUNE-T Road Train Member

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    I see now. Thanks. Will check it out
     
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  6. harold6091

    harold6091 Light Load Member

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    k31 here. i still have my 171702 for sale if any interested.
     

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  7. harold6091

    harold6091 Light Load Member

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    i just got my computer fried. due to oil. mechanic says it can go inside the oil pressure sensor wire. might as well replace it . its abiut 50 bucks. very easy to do
     
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  8. harold6091

    harold6091 Light Load Member

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    on another note. so i have decided to slow down to 60 mph and this is my current mpg. im pulling an empty dryvan in FL. ill post an uodated when running loaded. at 65 67 mph i was getting 7.2 loaded so we ll see how it goes
     

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  9. DDguy

    DDguy Light Load Member

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    The Dash Numbers wont do justice unless your Ecm is set Bang on to read milage If it has been tuned its likly off
     
  10. DUNE-T

    DUNE-T Road Train Member

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    Do manual calculation
     
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  11. harold6091

    harold6091 Light Load Member

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    is not. i do manual calculation and the dash is accurate
     
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