i have posted this on other websites and have yet to find whats wrong. i have a 96 5 speed with the 215 pump. everything is stock besides the fuel plate which is a #0 and i have low fuel pressure under load. at idle its about 24 psi and while revving in neutral to 2000 rpms i have 30-35 psi. while accelerating or climbing a hill the fuel pressure drops to 10-15 psi. i have an adjustable over flow valve which will increase the pressure at idle and revving in neutral but will still drop down to 10-15 psi while driving. ive changed the fuel filter multiple times, cleaned the pre filter screen multiple times but its never been that dirty, deleted the fuel heater, i have checked the fuel shutoff solenoid for the right adjustment and making sure its pulling up all the way, ive replaced the lift pump twice once with a cummins one from genos and another time with a hot rod one from power driven. the hot rod pump raised my idle pressure to 30 psi but under load it would still drop to 10-15 psi. ive replaced the fuel line with 3/8 marine grade hose and put a new sending unit in the tank but nothing has fixed the low fuel pressure issue. ive used multiple gauges to make sure the gauges isnt bad and they have all read the same. at 15 psi the truck still runs somewhat decent but once it drops below 15 the engine starts sounding different and loses power.