i have a cat but im sure its the issue and i have a new one but the old one some dummy welded to the flange where you bolt one on and i dont have a welder so i cant fix it . also no shop will weld it on cause they say its against the law unless i buy a new one from them.
no codes for the o2 sensor and no im not over heating car does not smoke at all.
runs great until you try to go past half throttle think its a bad injector. i dont want to spend alot of money on this since i have a motor im building for it. most places tell me that where it failed 99% of the time is the cat.