(Just a quick note I have done a 165 to 730 swap)

Well everything was going well until the car just died. It was running off the 730 and I was booting up the laptop to start using data master. After a few min. of trying to get data master to work the car just died. I used Data master the night before with no problems. Now the car does not start with the 730, and the SES light flashes a code 12 everytime I turn on the key. The cooling fan runs as well. Which means the car thinks it's in diag. mode, but the pins are not jumpered @ the ALDL. I pulled the chip out of the ECM and still the SES light and all comes on. I unplug the ECM and turn the key on, all systems go. I plug the 165 back in all good. Plug the 730 in NO go. Did my ECM go bad? What would be a good place to start?
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I just got done playing with the car, and find that craigs adapter or the chips are the problem. I doubt Craig's adapter though. It's pretty simple, and I see no problems with the adapter. Unless it is is not making good contact? Not adapters fault though. So, this leaves me with chip. I am using the amtel AT29C256 chips. Car would do nothing until I reprogrammed the chip and it worked great from there, for a short time. Then dies. I have tried 3 different chips. All have the same result. Sound like bad batch of chips, or is something making them go crazy?

 

That's weird... Might want to do a close visual inspection of the adapter, make sure nothing is FUBAR'ed. If it ends up you think it's the adapter, let me know and we'll take care of it...