I was working on some misrouted vacuum lines that might be the cause of no boost past 4,500rpm, and I found an inlet that doesn't have a hose connected to it.

The big brown thing towards the bottom is the blow off valve for the primary turbo. Right below that, you can see a blue hose making a U turn to the Charge Control Actuator. To the left, you can see a threaded open nipple. I've tried looking at the diagrams online but can't figure out where that is supposed to be connected to.

Any ideas?

 

have you even tried to put a hose on it,then cap the hose to see of it makes any difference?

 

can't see the nipple O.o

 

BTW in that position you have only the brown bypass valvle and

2 hoses then go to 2 solenoid out of the rat nest...one of these? (wastgate and turbo precontrol) (green and pink hose)

 

I just took a loser look at the picture. Its just a threaded rod that looks like a bolt screws on to. No need to plug anything!