2015 pro star isx15 cm2350 Intermittent stalling

Hello, I’m seeing if anyone has had similar issues or knows what could be causing this problem. 2015 pro star isx15 cm2350
So, Ian having an issue with my truck randomly losing power while driving…it happens more often when I’m under a load and/or pulling hills. I’ll just be driving and everything will seem fine…then all of a sudden I’ll lose power to the pedal (motors still running) if I downshift or go into neutral the motor then stalls. If I try to ride it out when I lose power to the pedal and my speed drops to 5-10mph—the motor stalls

when I pull over, most times the truck won’t crank right away..it sometimes takes a few minutes then fires right up. But here recently I’ve noticed that after it happens and Ive stalled out already I’ll turn the key in the ON position and I won’t hear the lift pump running. I have to key it on several times before the lift pump turns on (doesn’t happen everytime…sometimes the lift pump comes right on at key on) now I’m not sure if that is two separate issues or if one is affecting the other. I’ve already changed quite a few parts, but to no avail

ecm (less than a year old)
Crankshaft position sensor
Camshaft position sensor
Turbo speed sensor
IMAP sensor
Exhaust gas pressure sensor (less than a year old)

im getting really frustrated bc shops haven’t been able to figure it out…and like I said if typically only acts up when pulling a load

OH AND GET THIS…THERE’S NO CEL to even give me a clue where to start

Any help would be greatly appreciated

 

and that fixed your issue? And yes dash is still on when this happens

 

okay thank you much appreciated. I will try this

 

also what sensors did you change?

 

Okay thank you