Had a friend mig weld the CAT back in place. Upon starting it was again quiet. Strange enough the car was throwing a CEL P0200 before the CAT fell off. In addition for several years I have been fighting an irritating VIBRATION at idle ONLY, that causes my wife not to drive the car and only the kids drive it as they have no choice. I cleared the code before driving the car to my friend. The code never came back until after the CAT was welded back in and the car started ???. However now the VIBRATION is gone??? and PO200 is back.

Rod