[HotZ28]

Terminal "B" is the diagnostic terminal and if you don't have a terminal in that port, nobody can retrieve the codes, even with a scanner. I wonder if the wire/pin have been dislodged from the ALDL terminal? If the cam shaft magnet were broken or missing, it would not cause the engine to stall; however, it will cause stumbling during acceleration off idle, so this is not the problem!

Check for spark & fuel pressure the next time it stalls, more than likely you are missing one, or the other. With the symptoms you mentioned, I would first suspect the crank position sensor (CKPS) and then the ignition control module (ICM).