Okay. On our way then. It'* not the boost control solonoid. So much for the cheap fix. (this is assuming you disconnected and plugged the right connector!)
Now look at this pic:
See the vacuum connection to the top of the actuator? Comes out the passenger side on your car? With the car idling, the actuator should be in the OPPOSITE state as this. Fully bypassed, or retracted up into the actuator. If you disconnect that top line, the actuator should fully extend, taking the car out of bypass. On the end of the shaft, it'* attached to a lever on the supercharger itself. It should travel FULLY 90° between the bypass and boost stops.
Bypass points straight up, full boost is horizontal, resting on the tab closest to the #5 (front driver'* side) fuel injector.
Did the actuator achieve full travel?