1993 ford e350 with 7.3 no turbo problem
 

Hello all I'm about to loose my mind with this truck. I bought truck about 7 years ago when I bought truck it had a one piece fuel filter it had a drain on the bottom of it. I replaced fuel filter from ford but they also sold me a bottom separator for the new filter. Weeks later I started to have a problem with the truck stalling. I brought the truck to ford and they changed injectors and injection pump. When I left ford the truck died on me. I decided to fix truck myself. I changed fuel pump on block and that didn't do it. Then I changed sending unit in tank and that worked truck ran great.
About a month ago I was driving truck and when I accelerated ithe fuel filter light came on. I changed the fuel filter. About two weeks ago the light came back on at acceleration but then the truck died it took a while to get it started again but it did I changed fuel filter again and same problem. The truck idles fine but on acceleration fuel filter light come on and dies. I checked sending unit in tank but it was clear. I blew air thru the lines and all seemed clear
Please help I'm out of options and don't trust non of these mechanics around here. It's a 1993 ford e350 with a 7.3 non turbo. Please help

Did you check to see if you have any fuel leaks anywhere around your filter & pump & that stuff?

i do not see any leaks anywhere

I am far from an expert, but have you had the lift pump checked, or changed recently?( I saw that it was done when you bought it) If the IP is not getting enough fuel to it, but enough to idle, it could cause this problem.