I tried hooking it up both ways and did the same thing both times i let off right away when i found out it was going back down to 22psi after shooting up to 30. I did the wastegate acutator test and it would jump up to 19 or 20 psi and then drop back down to like 15 in that range. The modifications i have done are apexi downpipe greddy catback exhaust, injen intake, magnicore plug wires, ngk irridium plugs, greddy type s blow off valve, b&m fuel pressure regulator, holley 255lph fuel pump, rc racing 550cc injectors ready to be put in, b&m short shifter, shifter bushings, polyurathane motor mount inserts, autometer air/fuel, boost 30-0-30, and oil pressure gauge and an hks turbo timer. If you could help me with this problem it would be great right know im guessing i need a new wastegate acutator but would it even be worth getting it cause i plan on getting a 16g sometime in the future. I'm leaving the mbc off and running the hose from the turbo housing to the wastegate. Thanks for the help.