[Gmecm] ECM compatibility...

[David Allen]

Robert, here are some pictures of the ECMs in question. They look very much identical. I'll be intertested to try running $A1 and $59 on this. If it works, it will help me out because there are a lot of 3300 cars currently at the junkyard.

Sorry for the large filesize, but I wanted PNG compression so the details of the PCB would not be blurred by the lossy JPEG compression.

I keep having things "come up" and haven't tried plugging it in yet!

I have a feeling there COULD be a difference in the limp-mode functionality. The 3300 engine was a MAF and the others speed-density. Maybe if one didn't care about limp-mode functioning it would not matter.

Thanks,
David

http://68.209.87.173/temp/7730_1.png
http://68.209.87.173/temp/7730_2.png
http://68.209.87.173/temp/7730_3.png
http://68.209.87.173/temp/8706_1.png
http://68.209.87.173/temp/8706_2.png
http://68.209.87.173/temp/8706_3.png














  ----- Original Message ----- 
  From: Robert Saar 
  To: gmecm at diy-efi.org 
  Sent: Wednesday, November 07, 2012 3:53 PM
  Subject: Re: [Gmecm] ECM compatibility...


        the 7730 already has all of the outputs necessary to run the 4T60E, and i'll agree with Jay, i don't remember seeing a 60E with the 3300 cars.

        might want to pop it open and take some pics to see what is different from a 7730?

        --- On Wed, 11/7/12, David Allen <davida1 at hiwaay.net> wrote:


          From: David Allen <davida1 at hiwaay.net>
          Subject: Re: [Gmecm] ECM compatibility...
          To: gmecm at diy-efi.org
          Date: Wednesday, November 7, 2012, 8:50 AM


          Thanks for the info.  I bet it has outputs for the e-series transmission shift controls. I beleive by 1993 the 3.3 cars had a 4T60E trans.  Today if I have time, I'm going to see if it will run the MAP $A1 code in my 2.8 powered car.

          Sincerely,
          David.

            ----- Original Message ----- 
            From: Robert Saar 
            To: gmecm at diy-efi.org 
            Sent: Tuesday, November 06, 2012 4:57 PM
            Subject: Re: [Gmecm] ECM compatibility...


                  http://www.exatorq.com/ludis_obd1/p4xref.html

                  looks like it is indeed a 7730 variant.... possibly missing a quad driver or has something added, used on the 89-93 3.3 cars.

                  --- On Tue, 11/6/12, David Allen <davida1 at hiwaay.net> wrote:


                    From: David Allen <davida1 at hiwaay.net>
                    Subject: [Gmecm] ECM compatibility...
                    To: "GM-ECM" <gmecm at diy-efi.org>, diy_efi at diy-efi.org
                    Date: Tuesday, November 6, 2012, 3:58 PM


                    I have an ECM 01228706 and beleive it is a 7730 variant. Is there a list of 
                    compatible OEM numbers somewhere?

                    Thanks!
                    David 

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