01 Volvo D12 pre egr boosting only 7psi

Nw suburbs of chicago il

 

not at this time but you never know at this bussines

 

in my understanding this engine its not loaded with hundred sensors , computers etc... its just hard to find good mechanic... i have also other problem (vibration on different speeds) and i spend around $6-$7k and no results... its easy to say change this and if will not helps we can change other parts...
so i'm thinking... its boosting 15psi around 1800-1900rpm so maybe its problem with EPG? it open little more on very high rpms? i was driving yestersay w/o trailer on highway to check few things and let say from 0-80mph (pedal to the floor) it will boost only 5-7psi... with trailer it need more power to pull so only then its boosting 15psi on high rpms.... its so wird...
how to check this EPG and how to check fuel pressure? i will do it my self....

 

there is one more thing... exhaust temp (when i'm fully loaded and when accelerating hard) its going up to 1200 degrees (red line)
i will make video of this today

 

thats the video... on the way for p/u... empty with empty tanks...
http://youtu.be/X3Bo8clZnKg

 

and there is video with 34k lbs on the trailer....
http://youtu.be/NxeIeHq6iOY

 

nice... i need to make sure in 100% its turbo before i will replaced... i'm just tired of changing wrong parts...