I just found a boost leak on my car. It was coming from the T under the intake manifold that attaches to the EVAP Canister Purge Regulator valve (N80), the Leak Detection Pump (V144), and a port below the intake manifold.
I tried to just put new clamps on the plastic T but that didn't work out so well. It just continued to leak. Because of this I opted for the easier solution and I pulled the T out and plugged the line running to the intake manifold port and left the other two open (Evap and LDP). The car runs fine, builds boost a little bit quicker, and I am getting no CELs so I'm assuming I am in the clear but I wanted to make sure.
I did a search but I'm not pulling up any information on the LDP or what it does.
* What is the leak detection pump?
* What is its purpose?
For reference. The T I am referring to is located between 19 and 18:
* Please note the above diagram is for an ATW engine I believe. In my Bentley manual, that intersection is marked as 16 and 15 from page C 21-2