Turbocharger?

[Ravenwood]

On the fuel I’m around 38 psi, smokes like a 425 Cat when I stomp the throttle, it lags like it’s running a non VGT turbo. That’s when it’s running good!
When it acts up around 30 psi, the air cleaners howl you can hardly see the back of my trailer with the smoke. If I hit 1700 it will maybe act up, if I bring it up to 1900 it probably will. Only under full power, if it’s running 1/2 power it’ll do 2100 without any issues.

On the engine brake max I’ve seen is 20 psi, once I cycle the switch 30-35 psi and it’s consistent. It doesn’t work right unless I cycle the switch.

Fuel use is garbage again. Since the last update the NavPlus says 7.1 mpg but it’s 2 mpg at best.