[SuperBK]

The double solenoid that was shipped with the kit does not hold position. It either goes to one side or the other and when it does, the other side is exhausted to the atmostphere. You can make it hold by hooking up another solenoid to the exhaust and turning it on or off to make it hold. Another solution is to buy a valve that is "center off". It will hold position. See the other threads mentioned.
Brian