When i drive the car it boosts at 15psi by the way its a my93 wrx import but sometimes it cuts boost to 0.9psi. Then it goes back to 15psi couple of mile down the road have checked ecu no fault codes tryed reseting ecu still nothing. If you put your hand on the control solenoid and rev the car it sort of buzzs as if it is working. Can anyone shed any light as it is really beginning to annoy me