Ok I searched and got all the info and I've actually already fixed the problem, but I need to know why I had the issue in the first place.

Replaced opti, plugs and wires a few weeks ago. When replacing the opti I couldn't get it that last 1/4" so I used the bolts to pull it on. Friday, my car died on the way home while driving. I thought ok, it's the opti and it's my fault. I pulled the opti and the wear marks from the pin were in the right spots and nothing looked damaged, I even swapped it out with a spare opti I had for another project with no luck.

I read up on the Opti, ICM and coil tests and see that the ICM gets power from the ignition fuse. I'm not very good with electrical so I figure I'll check the fuse before I try and do the PIN tests and continuity tests and sure enough the ignition fuse is blown. I replace it and walla the car starts.

My question is why did the ignition fuse blow in the first place? My CPS wiring when I looked at it was all FUBAR'd so I need a new connector/pigtail so I can replace it, but would the CPS wiring shorting out cause the ignition fuse to blow? Could it be just a bad fuse or do fuses really last forever as long as the circut is good? Any insight appreciated.

 

The ignition fuse feeds the coil, ICM and crank sensor. Anything in the circuits to those could have caused a fault or excess current draw and blown the fuse.