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ecm tune,,,,,,

Discussion in 'Trucks [ Eighteen Wheelers ]' started by AKA_Rooster, Jan 27, 2017.

Page 1 of 3
  1. Jan 27, 2017 #1
    AKA_Rooster

    AKA_Rooster Light Load Member

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    Nov 6, 2013
    ohio
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    what would cause a tune no to last,,,or what would prevent it from not being applied?

    I had it bumped up at a cat dealer,,from 435 1650,,, to heavy haul 550 1850.. it's a 05 mxs.. it was night and day difference.. only lasy ccpl weeks and faded away.. had it checked throws no codes.. replaced wiring harness to actuators,,did injector test, max boost 17...

    could some wire somewhere be broken???
     
    AKA_Rooster, Jan 27, 2017
    AKA_Rooster, Jan 27, 2017
    #1
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  3. Jan 27, 2017 #2
    swaan

    swaan Road Train Member

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    BC canada
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    Your tune is fine. They dont fade away.

    Its something else.
     
    swaan, Jan 27, 2017
    swaan, Jan 27, 2017
    #2
    Ruthless Thanks this.
  4. Jan 27, 2017 #3
    AModelCat

    AModelCat Road Train Member

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    Did you say your boost is 17 psi? That seems pretty low. I'd be checking the charge air cooler and intake piping first.
     
    AModelCat, Jan 27, 2017
    AModelCat, Jan 27, 2017
    #3
    RustyBolt and Roger McG Thank this.
  5. Jan 27, 2017 #4
    AKA_Rooster

    AKA_Rooster Light Load Member

    50
    12
    Nov 6, 2013
    ohio
    0
    has new charge air,, and new turbo and piping all checked held 30 psi for more than min..with no drop.
     
    AKA_Rooster, Jan 27, 2017
    AKA_Rooster, Jan 27, 2017
    #4
  7. Jan 27, 2017 #5
    DL550CAT

    DL550CAT Road Train Member

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    Waynesburg, Pa
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    Sounds as if derating. Usually, in my case anyway, it's IVA related.
    Also, maybe, an exhaust sleeve going through the turbos. It will tear up the fins but still make some boost.
     
    DL550CAT, Jan 27, 2017
    DL550CAT, Jan 27, 2017
    #5
  8. Jan 27, 2017 #6
    AKA_Rooster

    AKA_Rooster Light Load Member

    50
    12
    Nov 6, 2013
    ohio
    0
    it was turned up and faded ,,before,, I had it converted to single,, conversion made no difference. cant find out why it's derating so no sleeve's now
     
    AKA_Rooster, Jan 27, 2017
    AKA_Rooster, Jan 27, 2017
    #6
  9. Jan 27, 2017 #7
    lilillill

    lilillill Sarcasm... it's not just for breakfast

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    Possum Booger, Alabama
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    You put a single turbo on it? Are the VVA's working? That's probably why it's derating.
     
    lilillill, Jan 27, 2017
    lilillill, Jan 27, 2017
    #7
  10. Jan 27, 2017 #8
    DL550CAT

    DL550CAT Road Train Member

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    Waynesburg, Pa
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    Ok did not realize you converted to a single turbo. I don't know what boost should be with that.
    But let me get this straight you have a factory ACERT tune and a single turbo?
     
    DL550CAT, Jan 27, 2017
    DL550CAT, Jan 27, 2017
    #8
  11. Jan 27, 2017 #9
    lilillill

    lilillill Sarcasm... it's not just for breakfast

    5,642
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    Nov 7, 2007
    Possum Booger, Alabama
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    That's the way I'm understanding it too and that ain't gonna work.
     
    lilillill, Jan 27, 2017
    lilillill, Jan 27, 2017
    #9
  12. Jan 27, 2017 #10
    DL550CAT

    DL550CAT Road Train Member

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    Oct 18, 2009
    Waynesburg, Pa
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    Not very well anyway.
     
    DL550CAT, Jan 27, 2017
    DL550CAT, Jan 27, 2017
    #10
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