Ok guys help me out. We usually work on Fords at our shop but have been expanding to every make and model. Anyway I have a 95 camaro at the shop with a 5.7L in it that stumbles bad under acceleration.

Full pressure stays solid at 45 psi when this happens so its not the fuel pump. I have heard alot of people talking about opti spark goes bad on these. True?

Tip of advice when I took the intake tube off that tube that runs down in front of the radiator was full of water and I don't know where it came from. The customer swears to me up and down that he never went through a puddle.

I am in the dark on this one. For whatever reason my scan tool wont hook up to this vehicle. Help me please. Also plugs and wires look good.