OK guys, After fixing my engine problem, now I have a new code-P0430- the clogged cats code. I have replaced all 3 O2 sensors with Bosch premiums and the truck loses power above 3000 rpm, so I'm guessing the cats(2) are clogged. Can I somehow clean them? Anyone have any luck doing that? I have seen some stuff that claims to clean them but I'm skeptical. Please advise.