I had a leak, changed the flex/cat converter, sounded fine. Then I lost power, so I needed a full tune up...did a FULL tune up, fuel filters PVC air and oil filters new wires and plugs and even the 02 sensors for the cat, everything was fine THEN my defog and heat would make the car lose power and the rear defog wouldn't work and I burned the Cat gaskets and I have a leak AGAIN???? WHAT is going on this is all in the matter of 2 months...??? I think my Cat is burned and the gaskets are burned as well? WHAT IS GOING ON?

did u change muffler? might be clogged.