1993 Chevy 6.5 starving for fuel
 

I have a new problem. The truck fires up and idles with no problem. But when driving the truck it starts to slowly die and seemingly starts to starve out of fuel. The truck just started this after we replace many parts last winter and it ran fine all summer.
Replaced all injector lines
Replace ops
Replace lift pump
Not leaking anything.
This problem is just driving me crazy.
Plus it is my plow truck and the winter is coming
Thank for helping
:scare2: