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Thread: Pulsing cooling fans when at temp.

  1. #1
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    Jun 2023
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    Pulsing cooling fans when at temp.

    Gen 3 computer
    1 fan setup
    The ground coming out of the computer pulses when its at temp. if i command it on it will stay running No problem
    I've tried different setting with all the same out come .
    Please Help . New to the tuning world

  2. #2
    Senior Tuner
    Join Date
    Nov 2006
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    2,742
    Post the tune. I think some early GMT360 had a PWM fan
    Tuner at PCMofnc.com
    Email tuning!!!, Mail order, Dyno tuning, Performance Parts, Electric Fan Kits, 4l80e swap harnesses, 6l80 -> 4l80e conversion harnesses, Installs

  3. #3
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    Jun 2023
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    Hey Alvin Here is my tune. i have tired lost in there so it might look bad.lol
    Attached Files Attached Files

  4. #4
    Senior Tuner
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    Nov 2006
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    Quote Originally Posted by Willbilly View Post
    Hey Alvin Here is my tune. i have tired lost in there so it might look bad.lol
    I see the problem. This should fix it.

    matt z cooling.2.hpt
    Tuner at PCMofnc.com
    Email tuning!!!, Mail order, Dyno tuning, Performance Parts, Electric Fan Kits, 4l80e swap harnesses, 6l80 -> 4l80e conversion harnesses, Installs

  5. #5
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    Jun 2023
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    Thanks Alvin . what would have been the cause for it to pulse the relay ?