Lack of power up hill loaded or empty

[Rawze]

Truck make, model, year, miles, and maybe some more history.

What is the rear end ratio for the truck?.

What is the boost getting to in a hard pull?.

Is it consuming and coolant or oil?.

How old is the turbo actuator / turbo?.

Anyone bother to do a CAC leak-down test, etc?.

How old is the exhaust system?. Mufflers do clog up and cause power issues when they have upwards of close to a million+ miles on them.

Anyone bother to change out the exhaust pressure sensor and ensure that its circuit that goes thru the thermostat housing is not clogged up?. they tend to clog up as the engine gets older.

Anyone bother to change out the Delta-p sensor, and clean out its feed-lines, hidden behind the fuel filter area?. -= Most people miss that one.

What about the intake pressure and temp sensors?. Ho0w old are they?