2006 Columbia Detroit 14l

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Cruzindown80, May 21, 2022.

  1. Cruzindown80

    Cruzindown80 Bobtail Member

    7
    2
    May 7, 2022
    0
    I am having 2 issues with this truck while in 10 gear when hill comes turbo stops and blow black smoke out the exahust I shift down to 9th and rpm goes to 17-1800 and power is back. I changed the Vpod and turbo boost sensor still the same issue.

    2nd The engine fan wont stop running I changed fan solenoid and fan clutch it still runs full throttle.
     
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  3. Willis Inc.

    Willis Inc. Bobtail Member

    35
    16
    Nov 2, 2020
    Harrisburg, PA
    0
    Did you get the fan (on) problem resolved? My fan is doing the same.
    Thanks, Willis
     
  4. Willis Inc.

    Willis Inc. Bobtail Member

    35
    16
    Nov 2, 2020
    Harrisburg, PA
    0
    Turned out to be my AC high pressure switch. I put a paper clip in as a jumper, it is a Neg -. in / Neg -. out circuit.
    It is in series with the Neg - side of the fan solenoid. What made this trouble shooting so hard was that my analog multimeter was reading 12 volts at the plug for the solenoid but it would not work. Because of the weak ground { NOT OPEN }coming thru the AC high pressure switch.
    Hopes this helps some one.
    Willis
     
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