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Thread: Pulse width Modulation???

  1. #1
    Senior Member
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    Jun 2005
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    126

    Default Pulse width Modulation???

    I get a sorta shuttering from the trans at around 60MPH when the getting into the throttle very slowly (highway crusing) hard to repeat, but like downshifting shifting from 4th-3rd.

    Someone told me b/c of my torque converter I need to up the pulse width modulation.

    Anyone know where thats located under, or if there is a different meathod of tuning the trans to get rid of the shuttering.
    2000 Corvette Twin Turbo
    2004 CTS-V TVS 1900
    2006 TBSS TVS 1900

    All Tuned by
    Rad Tunes by Troy
    aka Vetteboy2k

  2. #2
    Joe (Moderator) joecar's Avatar
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    Default

    I don't see a tune parameter for this.

    To better see what's going on, post a log chart showing:
    VSS
    RPM
    SPARK
    TP
    MAF
    MAP
    IAT
    ECT
    TFT
    PRND
    Current Gear
    PCS
    last shift time
    last shift error
    TCC PWM

    and also these pids or state pids (I can't look them up right now...):
    TCC flags
    brake pedal switch flag
    3-2 solenoid

    Be sure to be logging in 10 fps mode.

  3. #3
    Lifetime Member SSpdDmon's Avatar
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    Jun 2005
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    1,558

    Default

    Quote Originally Posted by joecar
    I don't see a tune parameter for this.

    To better see what's going on, post a log chart showing:
    VSS
    RPM
    SPARK
    TP
    MAF
    MAP
    IAT
    ECT
    TFT
    PRND
    Current Gear
    PCS
    last shift time
    last shift error
    TCC PWM

    and also these pids or state pids (I can't look them up right now...):
    TCC flags
    brake pedal switch flag
    3-2 solenoid

    Be sure to be logging in 10 fps mode.
    Hmmm...deja vu :?

    http://efilive.com/forum/viewtopic.php?p=12538#12538

  4. #4
    Joe (Moderator) joecar's Avatar
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    Apr 2003
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    28,403

    Default

    Yes, deja vu aka cut-n-paste; we want to see basically the same info in both cases.
    8)

  5. #5
    Senior Member
    Join Date
    Jun 2005
    Posts
    126

    Default

    I will get this info, however its going to have to wait alittle while. Going to the tuners today to have them get started on the TTI Twin Turbo install.
    2000 Corvette Twin Turbo
    2004 CTS-V TVS 1900
    2006 TBSS TVS 1900

    All Tuned by
    Rad Tunes by Troy
    aka Vetteboy2k

  6. #6
    Senior Member
    Join Date
    Jun 2005
    Posts
    126

    Default

    Just an update on the Turbo install as I am quite excited :!: :!: :!:

    Motor was pulled from the car. Heads, intake, cam, all removed. Turbos mocked up for clearances and ground down motor mount and front cradle slightly to clear turbo wastegates. Oil pan dropped to drill and tap for oil lines.

    Not bad for a half day :!: :!: :!:
    2000 Corvette Twin Turbo
    2004 CTS-V TVS 1900
    2006 TBSS TVS 1900

    All Tuned by
    Rad Tunes by Troy
    aka Vetteboy2k

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