fuel pump?

What is your question?

I have a rough idle. when I go to accelerate, the truck lurches forward and sputters like it can't get any gas and would hardly accelerate I can feel a knock on the pedal and it feels like it's about to stall. if I leave it at idle it would stall, but I can pin the accelerator and keep the engine running while in neutral, then the engine would go back to a rough idle to stall. I replaced the throttle position sensor and air filter. more mechanically inclined friends of mine think IAC valve or fuel pump. 1998 dodge ram 1500 5.9L magnum gas

What makes this problem better or worse?

high rev makes it better

How long has your 1998 Dodge Ram 1500 had this problem?

9 months ago then parked, tried to solve the problem yesterdat with no change