91 lumina euro 3.1

I am not getting any spark on my lumina. Checked diagnostic codes, all it is showing is 12. replaced ignition module and all three coil packs, still no spark. Any one with suggestions on where to look for a problem. Was driving yesterday (thursday) and it just quit. I really need to get this thing going by sunday 1-15 so any help would be appreciated.

Thanks

Might want to look into the crank position sensor or the ECM (computer)

wouldn't there be a code if the crank sensor was bad? Can either of these be tested?

Get a scanner on it , if no cranking rpms the cps or the icm can be at fault or the wiring from the cps to the icm.