my car didnt pass the emissions and i changed the oil, plugs and i changed the 02 sensor but it still faild if anyone knows how i can get it to pass please let me know thanks

 

Hah, take it somewhere else to get emissions. I had to take mine wayyyy far away for it to pass. I doubt anything you do will make it pass..

 

it could be a ton of things. Off the top of my head, a bad cat... How warm was it when you took it? You could also do many things to 'make it' pass... Search, as this is has been covered a million times...

edit: read the faq as well, it has a chart of attributes of failure...