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SCT X3 Tuner is a POS

This is a discussion on SCT X3 Tuner is a POS within the Computer & Tuning forums, part of the LSx Technical Help Section category; Bought an SCT X3 Programmer and is really pissing me off, I had problems during WOT. I started the program ...

  1. #1
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    White
    02 T/A WS6

    SCT X3 Tuner is a POS

    Bought an SCT X3 Programmer and is really pissing me off, I had problems during WOT. I started the program off doing one thing at a time. I tuned to 93 octane from the default of 91 first with no problems. It wasn't until I advanced the timing by two degrees through both RPM bands (2k-4k and 4k+) that I started to have problems.

    In 3rd gear at WOT around say maybe 4k RPM's, the car started hesitating and bucking like crazy to where it was not drivable in WOT. I took the timing out and it stopped. I found that no matter what I try to tune in the car that it still does that bucking.

    I thought maybe it was my spark plugs, but I changed the plugs and plug wires and STILL have the problem. Is there something wrong with my tuner?? WTF is going on here?
    13.81@102.2mph 2.0 60'
    Bone Stock, Street Tires

  2. #2
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    Supersonic Blue
    2012 Z06

    Just a guess but mine did the same thing you are describing by advancing the timing with HP Tuner with traction control on. Try a pass with the TC button off and see what happens.

  3. #3
    Member c5z28's Avatar
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    On your ass flashing
    my highbeams

    handhelds are for fords, ditch it get a real tune.

  4. #4
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    Quote Originally Posted by c5z28 View Post
    handhelds are for fords, ditch it get a real tune.
    Yea, I might. Hey, where are you from in the Bay Area? I'm originally from San Jose.

  5. #5
    The Bandit Wesman's Avatar
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    1998 Trans Am WS6

    Have you checked the spark knock signal to make sure you're not getting actual knock?

  6. #6
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    Quote Originally Posted by Wesman View Post
    Have you checked the spark knock signal to make sure you're not getting actual knock?
    To be honest I'm not really sure how to do that.

  7. #7
    The Bandit Wesman's Avatar
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    Quote Originally Posted by the.palmetto View Post
    To be honest I'm not really sure how to do that.
    You will need a scan tool. Either a GM Tech II, Snap on Scan tool (Modis), or software like LS1 Edit or HP Tuners. Autotap Diagnostic will also work, but you'll need the optional GM Parameters addon.

  8. #8
    Member c5z28's Avatar
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    Quote Originally Posted by the.palmetto View Post
    Yea, I might. Hey, where are you from in the Bay Area? I'm originally from San Jose.
    Livermore, east bay.

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