Over Boosting? Need some help guys

[talonsway]

When i tested the waste gate to see what size spring was in there. I hooked up my air compressor to the waste gate port, ever so slightly watched the gauge on the compressor as i slowly turned it up and at about 10-12 pounds the arm moved, then slowly retracted. I will be unhooking the waste gate arm to see if there is a possibility the flapper is stuck shut. But if i find out that it is not stuck shut and is moving correctly my next step would be go to the intake manifold for the boost source. Is that a good start? This is starting to really confuse me