I have a 2008 dodge ram hemi. My truck just started throwing code p0171 and p0174 today. It only happens when I push my throttle in half way or more the truck acts completely normal at idle and under light throttle. Idk if it would be the fuel pump/ filter. To me that is what it sounds like. What do you guys think?? Thanks for the answers.

 

Also it only hesitates at half throttle or more.

 

The filter in part of the pump. You might try driving it with a fuel pressure gauge hooked up to see if under load that you have a pressure drop. It sounds like it is leaning out for sure.