Electronic control unit for 1993 sedan DeVille
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Electronic control unit for 1993 sedan DeVille in Past Cadillac Vehicle Discussion; I have another ECU for my '93 Caddy Sedan Deville. It has a "cleaned up: chip in it. I had ...
  1. #1
    cortezit is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Mar 2008
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    6

    Red face Electronic control unit for 1993 sedan DeVille

    I have another ECU for my '93 Caddy Sedan Deville. It has a "cleaned up: chip in it. I had Harris Performance Products burn a chip for me which removes all of the "Programing anomalies". I have it installed in a spare ECU. My problem is that I do not have a book which tells me where the ECU is located. I removed the glove box and looked at the 2 ECU units there. I think that one is for the SRS and the other for the ABS. Am I right. If so where the heck is the main control unit located at??

    cortezit

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  3. #2
    onecool is offline Cadillac Owners Fanatic
    Automobile(s): Deville
    Join Date
    Dec 2005
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    267
    Remover the passenger side hush lower panel . And towards the back there is a 10mm nut remove it push the ECM/PCU up and then lower it you may want to un plug the connectors first.

  4. #3
    cortezit is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Mar 2008
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    Re: ELECTONIC CONTROL UNIT FOR 1993 SEDAN DEVILLE fwd

    I found it last night. It is called a Power Control Module in the Mitchel book, I subscribed to that service way back when and had forgotten about it. I took down the module and changed it out with on (same exact number) and the reprogramed Harris Performance Chip (tbichips.com). He had done a chip for me on a custom TBI setup that I was running in a Chevy pickup so I asked him (Brian Harris) if he could do something with the Cadillac and he said yes.

    I have noticed that it is crisper on the throttle since the install. We will see what it does for fuel mileage. I get 24.5 now with it on our road trips to California from Northwest Washington State. Thanks for getting back to me on this.

    cortezit

  5. #4
    onecool is offline Cadillac Owners Fanatic
    Automobile(s): Deville
    Join Date
    Dec 2005
    Posts
    267
    The nerve of Mitchell book calling it a different name and to think us Old guys call it a computer.

  6. #5
    cortezit is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Mar 2008
    Posts
    6

    Re: ELECTONIC CONTROL UNIT FOR 1993 SEDAN DEVILLE fwd

    It was probable a twitter tweet that caused them to change it. What ever happened to the hand crank telephone?

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