Originally Posted by jwikoff99
Something makes me think it'* not the O2 sensor. CO is caused by a rich condition, and NOx is caused by a lean condition (extra heat, dissociation and the like). With a bad 02, it seems like you would have more of one, and not the other. Which leads me to the cat. The EGR, I dunno, nor do I know how to diagnose a bad one.
BTW, only the front 02 would have any affect on emissions. The rear just monitors the condition of the cat.
DA WINNA !!!!!
Replaced the cat.. the old one was empty.. nada.. nothing in it.. did the test day after the cat change ( cause they said the Cat needs to work in so couldn't do it then and there ). So I have an empty cat sittin at home waiting to go back on when the emission gets removed 4 years later
. Will take pics of the empty cat and upload it this weekend. The bottom end with the new cat is much smoother.. no hiccups/misfire feeling cause of backpressure.. but the top and mid-range is gone.. I don't hit as high of a boost anymore..
but it passed so thats all that matters for now..
Thanx for all the help guys.. I learned a lot bout emission and CO/ NO reading meaning what.. the CO passed by 0.01 so I think I"m running rich, but I think that is contributing maybe by my T-stat.. running 180.. it heats up quick like normal.. but when I drive, it always is @ 1 notch lower then 90C.. and only get that high if I sit and idle for close to 10mins or so..