ISX cm2350 low. power/poor. Fuel milage.

[DPS567180]

Okay got cow term up and running. I made a screen recording going from the TA in Las Cruces to the loves about 6 miles away going westbound. There's a hill I had to climb And I thought it could show the best data. When getting on the interstate from the on ramp my boost was good actually was going 38-40 and then it bottomed out and when I hit the hill it wouldn't go above 30psi.. this load is a little bit heavier than I usually run I got 34,000 lb in the box. Here's a link to the screen recording hopefully I did it right.
https://youtu.be/8MHpG7o5sqk?feature=shared