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detroit 14 liter question turboish..

Discussion in 'Trucks [ Eighteen Wheelers ]' started by WorldofTransportation, Jan 2, 2014.

  1. Jan 2, 2014 #1
    WorldofTransportation

    WorldofTransportation Heavy Load Member

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    Sep 20, 2009
    Your mother
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    Have an 07 freightliner 14liter Detroit.... truck pulled great.. was getting ok fuel mileage now the ?wastegate actuator? on the turbo sounds like it is leaking air.... truck has lost power and mpg... It isn't an exhaust leak.. It sounds like the actuator diaphragm is leaking..


    The question is would this affect my power and mpg ALOT.. This thing went form 6.2 to 4.9 and dropping gears a lot more.. just now noticed this leaking today...

    Truck has been sick for a week or 2..
     
    WorldofTransportation, Jan 2, 2014
    WorldofTransportation, Jan 2, 2014
    #1
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  3. Jan 2, 2014 #2
    Helowrenchturn2

    Helowrenchturn2 Medium Load Member

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    Apr 23, 2013
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    Yes, it will affect mpg. New turbo and calibration will do wonders for you
     
    Helowrenchturn2, Jan 2, 2014
    Helowrenchturn2, Jan 2, 2014
    #2
  4. Jan 2, 2014 #3
    dude6710

    dude6710 Road Train Member

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    Mar 26, 2010
    MN
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    Is this non def?
     
    dude6710, Jan 2, 2014
    dude6710, Jan 2, 2014
    #3
  5. Jan 2, 2014 #4
    WorldofTransportation

    WorldofTransportation Heavy Load Member

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    Your mother
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    Yes non def...
     
    WorldofTransportation, Jan 2, 2014
    WorldofTransportation, Jan 2, 2014
    #4
  7. Jan 2, 2014 #5
    6 Speed

    6 Speed Heavy Load Member

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    Jan 2, 2014
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    I am no mechanic but had this same engine and did have a leak in the charge air cooler once,and several bad turbos.
     
    6 Speed, Jan 2, 2014
    6 Speed, Jan 2, 2014
    #5
  8. Jan 3, 2014 #6
    KeithT1967

    KeithT1967 Road Train Member

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    Springfield, Ohio
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    If the wastegate actuator is leaking your boost pressure can potentially climb high enough for the ECM to derate. That would certainly result in the symptoms you're seeing.
     
    KeithT1967, Jan 3, 2014
    KeithT1967, Jan 3, 2014
    #6
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