Picked up a new, second hand valve today. cost me 100 bucks from KYP!!!! He had better give me a good deal on the coilovers lol. Anyway Ben explained where the piping should all go aswell. Fairly common sense, there just has to be flow through the valve. Anyway i also ran some other checks. The solenoid is only supposed to activate when the engine is under load such as power steering and air con. I found that the plug that fits the solenoid outputs 12v all the time. I checked the unused purple plug on the harness and this one outputs 12v only under load. Next step is to clean the new valve in the ultrasonic baths at work . Then fit it, plumb it in properly, cut and rewire the plugs on the harness so the solenoid receives the appropriate voltages and walla - idle works (hopefully )