I have a 1993 full size Blazer with 350ci. It quit as i was leaving home and now will not crank. Spins over and the injectors spray but no spark to the plugs. It has new plugs, wires, cap, coil, and module. I have fire on the red wire at coil and fire at the two prong plug to the distributar. i checked all the fuses and they were good. Checked the timing and it was ok. any suggesions? Thanks...