I recently got a manual boost controller and after instal my guage would read 1.96 bar (28psi). Thats not the half of it, i got the controller turned off. why would it do that off. Ok so i thaught what if i turn it on. well after blowing my head gasket and spending about $1000 on fixing my sqrew up, I took the damn thing off. now im back to good old 11 psi. What in the world is up with this thing. Any body got any suggestions?