Well here I am trying to figure out whats wrong with my truck, This problem has progressively gotten worse over the past few days.

First off it is very hard to start and when I finally get it to fire it will idle fine, however when I press the gas it hesitates real bad and if I smash the gas it will die.
I have replaced the fuel filter and the fuel pump however it did not resolve the issue and im not sure where to look next.

Should I try some fuel injector cleaner? how can I tell if its not getting enough gas or if's getting too much gas.

Thanks in advance.