ISUZU FVR Power

Greetings friends, I have a consultation to do and I would very much appreciate the answers around the matter.
The point is that I have a Chevrolet FVR truck, it is of simple transmission, which at the time of loading in a climb, feels the forced truck and loses a lot of power.
If someone resolved this inconvenience I would appreciate your comment, they have told me that you can place an air mocha but I do not know how to do it, thanks to who can help me

Imajino that is a oil tanker since you do not say more information, you could have the escape system that usually happens, check the line that is not clogged, because by the same air it can be on occasion the butterflies are closed and strangle the air entrance.