Well, if anyone else is having this problem, here's the solution: Run a separate 12 volt and ground to the flyback board. My low impedance injectors must have been making a lot of noise messing up the crank signal. Fixed it, and it runs perfect

Brian

Red 97 Eclipse GS (420a) MTX
Custom Garrett T3 Turbo system
Megasquirt w/52 lb/hr injectors & a Walbro 255
Kicker/Alpine Audio (3 amps, 2 subs)
90 Cav 2.2 TBI auto (winter) <- yeah, it's fast