When you turn on the amal valve should click a couple of times. I'm certain the amal valve wastes to the air box until about 3-3.5k to help reduce lag and then it periodically opens and closes while boosting.

You can trying having it on all the time, the boosting characteristics might not be very good though.

If you could rig up a test light u could drive down the road and see what the light does, to identify if theres a fault or not?