C15 not getting boost

Discussion in 'Trucks [ Eighteen Wheelers ]' started by La415, Sep 19, 2015.

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  1. Sep 19, 2015 #1
    La415

    La415 Bobtail Member

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    Any way to tell if it's the wastegate/turbo going out or the ECM? I can't afford to guess wrong and replace them both right now.
     
    La415, Sep 19, 2015
    La415, Sep 19, 2015
    #1
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  3. Sep 19, 2015 #2
    AModelCat

    AModelCat Road Train Member

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    ECM's are generally quite bulletproof and 9 times out of 10 they get changed for no reason. Are we talking ACERT or single turbo C15?
     
    AModelCat, Sep 19, 2015
    AModelCat, Sep 19, 2015
    #2
    Confused Thanks this.
  4. Sep 19, 2015 #3
    062

    062 Road Train Member

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    Have you checked CAC and all piping for leaks?
     
    062, Sep 19, 2015
    062, Sep 19, 2015
    #3
  5. Sep 19, 2015 #4
    La415

    La415 Bobtail Member

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    Single turbo c15
     
    La415, Sep 19, 2015
    La415, Sep 19, 2015
    #4
  7. Sep 19, 2015 #5
    La415

    La415 Bobtail Member

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    Yes, pressured up the air to air. Checked all hoses and pipes.
     
    La415, Sep 19, 2015
    La415, Sep 19, 2015
    #5
  8. Sep 19, 2015 #6
    062

    062 Road Train Member

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    How low is your boost?
    Air filters clean?
     
    062, Sep 19, 2015
    062, Sep 19, 2015
    #6
    AModelCat Thanks this.
  9. Sep 19, 2015 #7
    La415

    La415 Bobtail Member

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    Yes, air filters clean. Boost varies- sometimes I won't get two pounds, then I'll get 25. It's not consistently down.
     
    La415, Sep 19, 2015
    La415, Sep 19, 2015
    #7
  10. Sep 19, 2015 #8
    Atruckerswife02

    Atruckerswife02 Light Load Member

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    Check the boots on your air to air.
     
    Atruckerswife02, Sep 19, 2015
    Atruckerswife02, Sep 19, 2015
    #8
  11. Sep 19, 2015 #9
    Atruckerswife02

    Atruckerswife02 Light Load Member

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    Nevermind I see you already did that...
     
    Atruckerswife02, Sep 19, 2015
    Atruckerswife02, Sep 19, 2015
    #9
  12. Sep 19, 2015 #10
    Atruckerswife02

    Atruckerswife02 Light Load Member

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    If you're not flashing any codes it's most likely NOT the ECM. One way to find out, disconnect the waste gate, leave it in the closed position, and see if you build boost.
     
    Atruckerswife02, Sep 19, 2015
    Atruckerswife02, Sep 19, 2015
    #10
    La415 Thanks this.
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