I'm not really sure if this is where this post goes but i need help and direction. I have an 88 TA with a tpi on an 69-79 350 block. Everything runs fine, starts up precisely, sounds great. But after about 30 minutes of driving when i press on the gas the rpms will decrease and the car will sort of "bog" out. when i let out the gas its fine. when i press it down again its fine for like a half a second then it does it again. If i really mash it try to see if it will clear up it will want to backfire. i can here it trying to come out the exhaust. The other day it did it and i tried to add some fuel system cleaner to see if it would clear up...no luck it did it again. I have a new Fuel Pressure Regulator, Hypertech AFPR, 22lb Accel injectors, ACCEL fuel pressure gauge. I NEED SOME TYPE OF DIRECTION. anyone have any pointers?

 

hows your fuel pressure under load?