I recently changed spark plugs, which you have to remover the intake manifold to get to. In the process I have broken a plastic fitting. A hose come out of the back of the intake manifold and runs down to the engine and connects to a plastic fitting forms an elown and runs into the engine. I have searched every diagram been to several parts stores nothing can tell what that plastic fitting is so I can get a new one. Anyone have any idea to help?