am i missing somthing

[TexasStyle280z]

this past weekend i pulled the throttle body off to clean it and i noticed a hole in the manafold. it looks like there should be somthing there but i can find anything in any of my books. attached is a pic of the hole in question.

so, am i missing somthing?

[zbane]

As far as I know, there should be a plug in there. That hole was used in the casting process of the intake manifold, and there should be others like it under each of the runners (though I may be mistaken)