Guess I forgot to mention that earlier. I already went hunting for this. I replaced all the plugs a couple months ago (they have about 8K miles on them now) and sprayed starter fluid around this weekend. No vacuum leaks. I didn't check the injector seals, but it doesn't matter -- I've traced the problem to the 02 sensor not being read properly. Problem is, it looks like the ECU, so I don't want to go off and replace it.
Can I put a new cat in to take care of the problem? How long will it last?