Hey I installed my turbo setup and i have a SPA RFL blow off valve and it does not appear to be working, well it works but isnt very loud. However my wastegate shudders after every shift. The BOV is completely backed out on the screw but i cant get it to work....the wastegate just shudders in between gears instead. Can someone please lead me in the right direction what to check or do? Also im running 8psi. on a b16 with a autochrome manifold.

Thanks in advance