Tomarrow night I'll watch for sparks. One of my MSD wires has a little wear in the outer coating, but nothing crazy. I patched it with some good ol' red tape.

Problem is, it could be so many things.

May want to test your MAT sensor too. Couldnt hurt if its messed up it will cause the mixture to be off.

ahh hmmm...I don't know that I trust those fuel injector cleaners too much. I knew I was getting mine rebuilt so I used STP'* cleaner every tank for 4 tanks then pulled them and sent them to www.injectors.com. Here'* the results:

BEFORE:
Cylinder: 1 2 3 4 5 6
Avg: 74.5 77.1 76.4 72.7 73.2 71.2 Difference: 8.4%
Reverse cycle: DIRTY DIRTY DIRTY DIRTY DIRTY DIRTY
Spray pattern OK N/G N/G OK N/G N/G

AFTER:
Cylinder: 1 2 3 4 5 6
Avg: 77.8 77.9 77.9 76.4 77.1 76.4 Difference: 2.0%
All patterns good


So after 4 bottles of cleaner the spray pattern on 4 out of 6 was bad and all 6 were rated as dirty, also a difference of 8.4% is unacceptable for smooth performance. This costed about $160 for all of them after taxes and *&h. Plus they come with all new pins, they're painted, and new o-rings. Might be something to consider if you wanna dig them out.