CM2250 low power poor mileage

[Rockinbexpress]

Not sure if I'm doing the cut out test right but each cylinder cut out sounds the same and when I shut them all off but one it runs for about 15-20 seconds then dies on each cylinder. But I did notice when I idled it up I can here a constant surging sound so I looked at the live data and noticed the fuel pump actuator Duty cycle was bouncing between 36 and 40% commanded pressure was 19200 measured was bouncing between 14k and 24k is this normal? Doesn't sound very efficient. You Gurus on here can help me figure this thing out. Thanks again guys