Can anyone help me tune the GReddy Profec B Spec II? I have it set to 6 psi for low boost but it spikes all the way to 8.1 psi and it feels like i'm hitting the rev limiter at like 5000 rpms, the boost gauge bounces from 6-8 psi. What can i do to make it hold the boost at a certain psi. Also another problem i have is my boost gauge reads higher than what the boost controller is reading. the boost controller reads like -81 vac, and the boost gauge reads around -20.