New ISX motor ?

[Camstyn]

A few questions, this is the only Cummins I’ve owned besides the 870.

Is 32psi oil pressure normal at operating temp, 1500rpm?

Is it normal for the turbo to continue to make close to 10lbs boost for a while after you’ve let off the throttle and started coasting? Feels like it’s putting resistance on the engine. Does not do it all the time.

Jake is weak, like weaker than my Paccar MX. You can hear/feel the difference between the 3 jake settings so 3rd stage is definitely activating. What could cause this in a brand new truck? It also shakes the truck (not violently) when it gets down to 1300rpm and under.