I have a 94 z28 and it wont start, i have fuel pressure and spark but no injector pulse. I feel like ive done every test possible. I think i might have found the problem but not sure. I found on my high and low resulution test for the ICM, im supposed to have like 1v while cranking, but i have 5v on high and low resulution. Does that mean that my optispark is bad? Ive just about had enough with this car, its really pissing me off. I just dont like throwing parts on somthing.