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Cadillac Powertrain Control Module (PCM) Tuning Discussion, PCM and VATS in Cadillac Engine Discussion; I posted a thread in the Alarm section but haven't had much help. Forgive me if there is a thread ...
  1. #1
    hcuda2 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Mar 2007

    PCM and VATS

    I posted a thread in the Alarm section but haven't had much help.

    Forgive me if there is a thread dedicated to this and point me in the right direction if you would!

    I have a 1996 STS. I got the Wait 3 Minutes to Start thing and then the car wouldn't start. I have a spare IPC and I can put that in and the car will start and run but none of the gauges work right and the mileage is way off.

    I have tried to bypass VATS using resistors under the dash but it still wont start.

    Is there a way to program VATS off of the PCM? I just want the car to run i don't care about VATS.

    I don't want to spend a fortune on this but I need to do something.

    Any help?

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  3. #2
    BCs71's Avatar
    BCs71 is offline Cadillac Owners Enthusiast
    Automobile(s): 1994 Cadillac Fleetwood Brougham (some show and some go!)
    Join Date
    Oct 2003

    Re: PCM and VATS

    I know with the 1994-6 Fleetwood LT1 PCMs it is definitely possible to program out VATS.
    Unfortunately I am not familiar with the STS hardware/software to comment on your model.

  4. #3
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
    Automobile(s): 94 Fleetwood Brougham
    Join Date
    Aug 2004
    Rockford, IL

    Re: PCM and VATS

    Give Lyndon Wester (http://westers_garage.eidnet.org/) a call and ask him, he can do NorthStar, but not sure what years.

    The "key" is in watching the security light/VATS light (or whatever they call it on the STS) and see what it is doing. It should go out with the proper key in.

    I don't know if it resets immediately, so grab someone with a 96 FSM and have them read up on the Security/VATS system.

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