HELP!! 300zx overboosting? Wants to stall out after?

[VacuumLeakZ32]

Hello I am pretty new here and always new to the whole turbo game. Well here's the background, picked the car up. Ran decent but have vacuum leaks. So we took our time and found a vacuum diagram and well there were a lot plugged but the wastegates actuator were unplugged, just an open stem. Now I installed a Greddy boost controller, ran 1 line from each actuator to a T fitting, then off the top of the T went to the selinoid, then we followed the rest of the diagram to run the vacuum lines and plug certain things. Now what happens now is, the vacuum is fixed, or close to it. At idol it's about -87- -97 on the Greddy controller. My stock boost sensor is still hooked up. Therefore my boost gauge on my clustered stil works but when I took it for a test drive, it drives and idols fine till I give it a little throttle, I can't full throttle, and when I build boost it overboosts on the controller saying i spiked at 20, yet the gauge on the dash doesn't go passed 7/9. Then the car doesn't run right and the oil pressure drops hella low. So I seen a guy some something running the recirc tubes, which mine has the bovs, but the recirc tubes into the piping are missing. So im gonna mock those hoses up today and see if that helps. Thanks for any replies!