Lift Pump??
 

My truck has been studdering out from 2000-2200rpms. Ive had a huge loss in power as well. ideas?

what is your fuel pressure at this time??

any codes??

What I would do is check for codes, of you have any you can start there. Also how old is your fuel filter? Could check that to.

Is it under normal driving, or with the edge on level 5 with your foot to the floor? Good idea to check the filter too like mentioned above...