I wouldn't bother with the hi/lo solenoid mate, just plumb it so your running high boost all the time (so vacuum tube straight off actuator to turbo). Seems like your running lo boost constantly, so could be a problem with the solenoid. I found that I couldn't run 12psi with my mods as it would creep and hit fuel cut, and 12psi is pretty damn close to fuel cut. I got my car rr'ed with 11psi and made 150hp and 137lb/ft which is quite good. I am now running only 10psi because over the winter it was creeping up to fuel cut (think because of my front exit and semi-relocated air filter.) I will be getting a JAM FCC and RRFPR over summer and running 15psi though, can't wait