Hey,
It's on the top of the intake manifold, whether it be on the body of the manifold or the runners, it's a 2-wire temperature sensor...
You really can't miss it...

Actually if you really have no clue, take a pic and we'll tell you, or even better yet, search google images for "b16 intake manifold" or something
then post it on here, then we can tell you exactly where it's at...