i had the same issue, When you face to engine from front of the car, this tube is on the back side below on the engine i am not sure if it is coming from engine or something else , but on the right. side of the exhaust manifold. it could be coming from transmission not sure. it is moving when i was trying to replace the hose. this tell me that it is not connected to engine. but i did not see anywhere that it is connecting to . is it supposed to be like that? And if i replace it with a quarter inc hose does it supposed to have that u shape where it is not connecting? thanks for the help!