that is the top of cylinder bank right, seen from right fender .
top right side, pop it out , 1 screw, and clean it and put it back
or put in new one.
there is no steps to tune it, it fits in, only one way.
https://www.rockauto.com/en/moreinfo.php...sn=9&jsn=9
http://www.fixkick.com