As title states. I dont want to buy a new one yet as im not sure if its my problem with poor idle (leads, plugs, injectors, filter, fuel pump all replaced and timing ok) I suspect it may be a blocked cat as there doesnt seem to be alot of exhaust flow (hot and lack of flow) i prefer not to get a second hand cat from an EL-EF as it may also be stuffed!

had any poor running conditions up to this point?

like MAP failure or something? that can block and kill them