I believe my catalytic converter is hollowed out and I don't think I have a resonator. Should I have a specific type of Catalytic Converter? What's the deal with the resonator? Should I be running one? Sorry but I'm not too familiar with all the technical terms and I don't know what a MIL or CEL is. (probably the only guy on here who doesn't) I haven't checked my ignition timing but now I will if you think that might be a cause. Regarding my O2 sensors I don't think they are in the stock locations but I have had serious idling problems back in the days with engine lights coming on and all of that. The O2 sensors were to blame but those days are over so I believe they are running properly.

Thanks for your advice. It has been helpful.