2015 Hellcat Challenger Losing Rail pressure under Acceleration

[mittentuning]

2015 hellcat mods:
-2.85 metco pulley
-id1050x injectors
-k&n cold air intake
-jlt dual catch cans
-95mm throttle body
-kenne bell boost a pump
-tuned on 93
-Catless

We just put a kenne bell boost a pump on a customers 2015 hellcat challenger. We have the tune set up with the right pulse width and fueling tables. However we keep getting code P018D popping up for fuel pressure sensor b circuit high. We have the 30amp fuse in for the fuel pump. all the tables for fuel pressure show 79.8 psi is being commanded. The fuel rail pressure drops from 57psi at idle to 33psi when under acceleration and at wot. We also have esp tq management disabled and tq tables maxed out at 967 lb-ft. we have gone through the tune and everything constantly making changes to fueling and still get the same results.

What are we missing.

Attached is the tune file and log.
2015 Hellcat 2.85.hpt
2015 hellcat 2.85 log.hpl

[fixit]

did you hook up a volt meter to the fuel pump, doesn't seem like its engaging

[N2speed]

most likely bad fuel pump