I am having the same P1477. I replaced several of the small rubber hoses on the back of the engine under the manifold and by the throttle body. I did notice that same tube sticking out with nothing on it but I cannot find a hose that goes to it. Does anyone know where the other end of the hose that connect to this plastic vacuum nozzle goes. There is another metal hose connector just under it. Is this where the hoses go from one to the other or is this a place for another hose? The plastic nozzle, pictured in the previous thread does have vacuum to it with the car running. The metal nozzle does not.