1993 is pre OBD, don't require programing, your 94 didn't need it either but they are quick to take your money!
I'm betting a f usable link for the computer went bad, did you check the computer to see if it has key'd power and power all the time?
what are you going to do when you buy the new computer and that doesn't fix it? there not returnable. slapping a computer on something is a bad idea, could frigg up the new computer and still not get it running
