I've had a boost leak in my Stagea for the last few weeks. I found that the vacuum line from the back of the engine to the MAP Sensor was barely on the block. Hopefully that was my source of my boost leak. I used the article Bypassing the Stock S2 boost limiter to see what difference it makes to my car. Here's hoping the trip to work is a little better than it has been for a while.
The bottom line from the boost solenoid was the line I blocked when I installed my Turbosmart single stage BC. I have left the top vacuum line connected from Boost solenoid to the intake manifold. It has never bothered me until I noticed the Stagea was really hitting boost like it used to. Current setup is stock turbo, stock ecu, HKS pod filter, stock SMIC, running approx 10psi.