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Thread: VATS disable question 1999 cavalier

  1. #1
    Carb and Points!
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    VATS disable question 1999 cavalier

    Im new to this and am wondering if there is a cheap way to remove vats. Iv been doing a little research i think i may be able to un solder the flash chip and read with reader but dont know how to modify the bin.

  2. #2
    Fuel Injected!
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    I believe that is a P08 controller. HP Tuners is the only software that I know of that offers support for these. EFI Live had marginal support available at one time, but I believe they have since dropped support (treating the controller as obsolete).

    I have never seen an XDF for a P08 controller.

  3. #3
    Carb and Points!
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    How hard would it be to find vats in the bin and modify the bin manually with hex editor?

  4. #4
    Fuel Injected!
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    Quote Originally Posted by ajpaynter View Post
    How hard would it be to find vats in the bin and modify the bin manually with hex editor?
    If you have a BIN file, and Hex editing software - open the BIN with the Hex editor, and take a look. Unless you have a "road map" of sorts to follow, it may become like finding a needle in a hay stack. You will also need to find a means of accurately updating the Checksum(s).

  5. #5
    Carb and Points!
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    What code should I be looking for? Is the code the same on all gm ecus or specific to the ecu OS.

  6. #6
    Fuel Injected!
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    Here is an example based on a 512Kb 0411 PCM. The VATS switch could be "00", "01", or "02". There are over 500,000 (7FFFF) possible locations in the calibration.

    Attached is a screenshot from a Hex editor, with a limited number of places the VATS switch could be. It is there.

    VATS - 0411 example.jpg

    Can you find the VATS switch ?

    To the uninitiated, working in raw Hex should be easy, right ?

    As I said in the earlier post, you will need some type of "road map" or guide to help you - which I have never seen for a P08 PCM.

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