So I have a 1993 f250 351w I have high nox so I pulled my egr and tried to remove the tube and the top part of the tube just pulled right out. It disconnected in the middle so I still have to remove bottom part of tube that connects to manifold. I have never done one of these and need to know if my tube needs replaced or if I can just clean the tube and replace. Here is a picture of top of tube..