So on the scanner - "I would recommend that you first invest in FORScan (
forscan.org) and a suitable adapter. I have an OBDLink EX usb adapter (should you wish to use a computer to collect data), or take a look at either a BAFX or OBDLink unit. Both BAFX/OBDLink have a bluetooth/Wifi units (there are a few folks around here that recommend them) that will would work with a smart phone (Run of the mill box store scanners and even a great number of the higher end scanners can't touch these trucks as Ford used the "heavy duty diesel" protocol for communication). Once you are setup I would capture data.. At minimum I would save RPM (really this is CPS), ICP, IPR, MAP, EOT and IVS (at least I think that is the PID for the go petal). FORScan will allow you to save the data as a .csv file which you can import into excel. The information you get from the truck will help identify what your problem really is without just "throwing parts" at the truck."
The EBPV is just after the turbine side of the turbo (not to be confused with the wastegate). It is designed to help with cold weather warmups. Over time the valve can get stuck in the closed position which severely limits the exhaust flow. There is a solenoid valve that supplies oil pressure to the push rod that operates the valve. I don't really think this is your problem, but it is something that you can check quickly.
I would get setup with FORScan and an adapter and start looking at the PIDs to see what the PCM is reading from the sensors and commanding the various actuators to do (before changing anything!). Stick with genuine motorcraft parts if you need to buy parts. Most folks report problems with aftermarket stuff (might be okay in a pinch, but long term most folks have problems).
Have the injectors ever been changed? On the blowby - while the engine is running - take the oil fill cap off, flip it upside down and place it back on the oil fill port. If the blowby is enough to blow it off the fill port you should do a compression check.
Cj