WTB: 7747 ECM that accepts the 27SF512 Chip

[dave w]

So I did Dave W's conversion with the ZIF chip on my '87 R10. Burned a new stock chip as well as a new tuned chip. And it ran great...for about 10 minutes. Then the SES light started flickering and I could only keep it running by giving it throttle at all times. I was trying to back the camper between my garage and the neighbors fence. Super fun! So obviously I screwed something up and while I could see about getting another ECM and trying again, I figured I'd see if anyone had one that they no longer needed. Thanks!

I have a known good and tested ZIF Modified 1227747 available.

If your interested, please send me a private message (PM) for details.

Chip offset information attached.

dave w

IMG_4033.jpg

[Mitch R]

Hi Dave, I'll send you a message shortly.

I'm going to confirm continuity in the appropriate places tonight after work, but the ZIF installation didn't exactly go smoothly. I have some soldering and circuit board experience, but hardly an expert. One of the circuit board traces came partially off with the original socket so I had to repair it by running a little wire to the appropriate ribbon cable pin at the end of the daughter board. I triple checked continuity everywhere and ensured every place had continuity where it should and none where it shouldn't but still something must've gone wrong. In hindsight, I shoud've just stuck the modified ZIF into the original socket, but I liked the cleanliness of Dave's design with the ZIF being attached directly to the board. I used a Burn 2 & TurnerPro and believe that I set the offsets correctly. It ran correctly at first, no SES light. I have tuned OBD II stuff before, but this is my first with OBD I.