Ok.. heres the deal.. two years ago i "upgraded" to a magnaflow catalytic converter. Roughly 6 months after having it installed i started to get the 67 code meaning the cat was working inefficiently, then the catalyst inside began to rattle huge. I went and purchased a direct fit replacement, now one year later... i still have the code and yet another catalytic converter is fried and rattling like pop cans dragging under my car. The car in question is a 2000 acura integra LS, only engine type mods are intake, header and exhaust. My car was fine with the stock catalytic converter. I cant see why my car would be dumping fuel and frying the cats....??? From what i understand code 67 has nothing to do with your A/F. Is it possible my timing is off???? what other reason is there that this keeps happening. I just dont want to buy another cat and have it crap out before my e-test in november. Any help or info is appreciated.

thanks

 

is the o2 sensors still any good ? did u replace them ?

 

its possible that the secondary one is shot. But from what i've read it doesnt affect the ecu with the Air Fuel mixture. I'm guessing if the primary o2 was bad there would be a code thrown wouldnt there be?