Emission test failed
4th Gear Member
Joined: Dec 2007
Posts: 1,599
From:
02s are your oxygen sensors. you have four in your exhaust. two are for each bank on your engine. one goes before the catalytic converter and one goes after the catalytic converter. the first one functions to give feedback on whether the engine is running rich or lean. the second one lets the car know if the catalytic converter is functioning correctly.
2nd Gear Member
Joined: Oct 2008
Posts: 342
From: Hughestown, PA
It could if you don't flash it back after you complete the emissions test... but for a short period of time you should be fine running on a higher octane grade with your mods.....
5th Gear Member
Joined: May 2005
Posts: 4,794
From: S.burbs Chicago
What the guy at the emmisions said is i failed because it could not complete the test he said that he was getting no reading from the engine or something. He said maybe the battery was disconnected and i should drive the car for around 100 miles then come back and retest. Im not sure why he wanted me to do that, but tomorrow i will find the sheet that he gave me and I will post exactly what passed and what failed.
Because the 1st thing that pops in a tester, or a tech when checking for obd2 codes, (this is what the emissions people are looking for) When they have monitors that are not ready, if someone disconnected the battery recently and the drive cycle has not been completed. You would get the same results, just that having o2's turned off, you will never get all ready status'
Joined: May 2008
Posts: 11
From:
It sounds like the rear o2s are turned off. I have a seperate tune for emissions. You do need to drive the car for around 100miles to reset the PCM. It works for me and I have American Racing headers with catted H and a bunch of other mods.