I want to replace the o2 sensors on my 99 Z, the car is running kinda shitty and i think i have narrowed it down to the o2s. Question is, I only want to replace the sensors that the computer uses to adjust the motors fuel usage. I do not care about the ones that tell the computer if my cat is bad. Where are the ones I am looking for located, and are their one or two of them? Thanks

p.s. I have searched here and on google, however "o2" is a hard thing to search for

 

your front o2's are up at the flange of the stock Header...
there is one per header basically at that location on both
and techinically this should be in the External Engine section....but you will learn all of this teh more you read on here....

by the way...
The "Search" button is your friend on here