ok i had started this under a different thread ,but it has changed to different symptoms, i have a 91 z with the 305 tpi, it will start and idle fine it just loses all its power after 3000 rpms , i have checked fuel psi while driving 42-50, i have replaced the cap, rotor, plug wires, coil, the plugs r only 2 months old , it has a new fuel fitler , plenty of fresh fuel in the tank, i have checked the timing its ok, it doesnt have any codes, but it still dont run right, i had the icm tested today also it was ok. I am running out of parts to replace, what should i go for next