Originally Posted by solidus

Couple things. Make sure you have your vacuum lines clear of the manifold and securely so. Second after much suspicion I found that the springs in the Tial wastegates read a bit off consistently. At first I thought it was my boost controller buat after checking around I talked with a major shop in the area and found that they would pressure test the springs before install and the same inconsistent readings were found with the springs. I finally went with the the next step lower than recommended. The boost controller can only regulate boost from that point up and no lower. But above all else make sure the vacuum lines stay clear of anything that might burn a hole in them. I got owned by a 1/4 inch hole in a vacuum line to the passenger wastegate.