Ok....you can stop being a f**king d**k!!!!! I was just helping out the man.....I didn't say to retard or advance bc I don't know about his car and it's different from mine....I'm f**king emission certified and they give u a piece of paper saying that if you fail NOx, the things that can affect it are but are not limited to ....O2 sensor...timing...cat.... and egr....soooo if you wanna be a d**k go ahead....just don't talk s**t!!!! Were all just here to try and help each other out!!!!!1