GRR.

OK so I have a 94 z28 Camaro 6 speed, cammed and bolt on car. So here is the deal the car was running very well then came out today and started it up drove it to the shop no problems, well on the way back I started it and it popped then died, and went to start it back up and it would just crank but not start, it started but then the tach was jumpy and when I would go to leave it would just pop and could really drive it, I had to coast back down to my house, I have changed plugs, wires, coil and opti, and I'm out of ideas. Thanks in advance.

Maybe chaeck fuel pressure, I had a similar issue where the car woukd drive great then like shit then great again and it was a weak pump

Ok what should it be? 39-42?

I believe so when at idel and around 21 on prime if I remember right

it was at 40-41 idle and 28 prime.

Also when I would bring the RPM's up to about 2500 and hold it there, it would drop down and come back up while my foot was still on throttle.

Rotor loose in the optispark is my guess.

That could be too, ive got my original opti already out of the car from when I did the msd upgrade

That mean I got to change the opti again? IT's got and msd right now.

If its the rotor in the opti ya you bsically have to pull everything again to remove the cap and check the rotor