Running a Northstar on a LS1 PCM. - Page 3
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Cadillac Powertrain Control Module (PCM) Tuning Discussion, Running a Northstar on a LS1 PCM. in Cadillac Engine Discussion; do they run a standard N* car though......
  1. #31
    CadillacSTS42005's Avatar
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    Re: Running a Northstar on a LS1 PCM.

    do they run a standard N* car though...


  2. #32
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    Re: Running a Northstar on a LS1 PCM.

    My car runs for 3 seconds.

    I need to setup a different type of VTD bypass The car sound BAD A$$

  3. #33
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    Re: Running a Northstar on a LS1 PCM.

    unplug the VTD?

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  5. #34
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by CadillacSTS2003 View Post
    unplug the VTD?
    I have no VTD module. I have figured it out and hope to drive this soon.

  6. #35
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    Re: Running a Northstar on a LS1 PCM.

    It runs for a while and then stalls.

    If I hold it at 2000 it will run great. If I change the throttle angle rapidly it stalls.

    This setup is supposed to have an LS1 MAF sensor. Well I have one. I will need to figure out how to attach it and wire it.

  7. #36
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    Re: Running a Northstar on a LS1 PCM.









    My head hurts

  8. #37
    msta293412 is offline Cadillac Owners Fanatic
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    Re: Running a Northstar on a LS1 PCM.

    DONT GIVE UP!.......Theres got to be a way.....You have all of our suuport......

  9. #38
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    Re: Running a Northstar on a LS1 PCM.

    I must be missing the boat here, but what will a LS1 pcm do for our northstars besides give us fuel and spark maps that weren't designed for our motor?

  10. #39
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    Re: Running a Northstar on a LS1 PCM.


  11. #40
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by darien99 View Post
    I must be missing the boat here, but what will a LS1 pcm do for our northstars besides give us fuel and spark maps that weren't designed for our motor?
    This program in the PCM is built for a NORTHSTAR

    This is a Custom High Performance Program built by GM

    The LS1 PCM has been hacked into. That PCM and a fully aftermarket tunable program is one way to make a caddy run hard.

  12. #41
    pjw315 is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.

    Aj are you giving up on this project?

  13. #42
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    Re: Running a Northstar on a LS1 PCM.

    I have a few small bugs. I got the rest of the piggyback harness done. I am running two PCM's. I push out a pin in the jumper and had no charging system. I just fixed it. It is insane fast. BTW 158 top speed. I was under the impression it was 200+.
    My VSS signal is messed up so 35 mph = 158 in the Shelby PCM, but the stock PCM shifts at the correct speed. after hitting 158 it will cut out

    I will be posting more today and tomorrow

  14. #43
    pjw315 is offline Cadillac Owners Member
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    Re: Running a Northstar on a LS1 PCM.

    I am looking forward to your posts. Do you plan on doing a dyno run once you have all the bugs worked out?

  15. #44
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    Re: Running a Northstar on a LS1 PCM.

    Quote Originally Posted by pjw315 View Post
    I am looking forward to your posts. Do you plan on doing a dyno run once you have all the bugs worked out?
    Yes this will take a trip to the dyno.

    I have the schematics for the following
    Sensor connector terminals
    ------------- A------------------B
    99 Deville -- High (PPL 401)----- Low (YEL 400)
    99 Seville -- Low (PPL 401)----- High (YEL 400) This is my car
    99 Carmaro -Low (LTGRN/BLK 822)--- High (PPL/WHT 821)
    99 Shelby -- Low (LTGRN/BLK 822)--- High (PPL/WHT 821)

    I am going to swap the two wires at the Shelby PCM and see if it works

  16. #45
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    Re: Running a Northstar on a LS1 PCM.

    Way to much power for for my already weak trans.
    I can't hold the massive power back. toasted my trans.
    video soon

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