The Amal valve has three outlets (R, W,C) the PRESSURE from the compressor housing goes via a hose to the amal valve (C), with no power the valve is closed and so the PRESSURE gets sent to the actuator where if sufficent enough it will overcome the strength of the actuator thus opening the wastegate.

However when the Amal is powered on a pre determined amount of boost is allowed to bleed off out the remaining outlet. The ECU controls the amal valve and it will have a boost limit within the software itself.

As an example lets say our actuator has a rating of 10PSI and we want to run 15PSI, to do so we would need to bleed 5PSI off via the Amal.

The actuators is supposted to be as described, otherwise if it were loose it would not be able to hold the penny shut

As said revving the car will do nothing, you need to get it out on the road, if revved hard enough when stationary you will make a little boost and be able to hear the dump valve.

Martin