I'm getting everything together to put TBI back on my '87 Subby... I've been thinking about what you guys said that maybe my ECM wasn't bad after all. I've thought of many explanations, but the thing I still can't explain is that when it finally died the ECM1 fuse was blown. I replaced it, the truck was still dead but it didn't blow again.

What kinds of things could make ECM1 blow?

I've been reading on this forum almost every day and have learned ALOT. Thanks for all the help.