A bit of info of what I mentioned on the thread.
View attachment 173667
The pipe in question is at the end of the pencil with the injector return removed.. when I got the original truck with the 24v in it... I really didn't like the vac setup and as the 12v of mine doesn't have any of that, then why should they be there.? This pipe was connected to an ecu?powered solenoid open or closed.
This engine only runs with the boost pipe thats above the pencil.
View attachment 173668
So looking at a normal pump without an egr, this one has a rubber cap on it and is open to air which when the boost actuator is operating it allows air into the area below the boost actuator.
So I came to the conclusion that air needs to enter this area to allow circulation in and out of this lower area to stop it from creating a vacume below the boost pin/compensator/actuator and causing drag.
View attachment 173669
So I used a vent cap off one of the solenoid on the end of the original pipe to cap it off and breathe as the pump does on the middle pic.