i believe i found my pcv valve on my 99 EX while looking from the undercarriage perspective. it appears to be right behind the oil filter. can someone confirm this for me. and i suppose if this is indeed it, the best time to change it is while i'm doing an oil change so that the filter is out of the way?

BTY: Also looking for the air intake sensor...

 

Do you suspect your pcv is going bad? What you are looking at is the pcv, but it's the valve that you want to replace. It should be a little elbow that goes into a grommet in the inatake manifold. Also, if you are talking abou thte IAT, then it's a small, white, tubular looking thing with a grey plug and it will be in a different location depending on which car you have, but generally toward the back of the manifold.


Looks like...