People keep telling me it can't be an 02 sensor, and other people keep telling me that an 02 sensor has given them a misfire so I'm not sure what to do. I've replaced the plugs (old ones were in bad condition, obviously old, covered in build up, cheap champion plugs) and it's still misfiring. I tried clearing the codes but still running rough (only ran it for a minute or 2 after clearing codes if that matters). My question is, what do I try next? Any help would be greatly appreciated. Thank you!