Hey guys, I've been (failing to) diagnose a idle problem and no power on my 97 2.2L. And while checking out all possible options I was mapping the Vacuum lines and on the intake where 3 lines come off right where next to the intake tube. One goes to the fuel regulator. I'm not sure where the second goes, but the larger of the three travels down in-between the intake manifold behind the engine, and dead ends open.

I pressed my finger to it with the engine running and there was no suction or effect on the engine, so I'm not sure what its purpose is, should something be hooked up to it?

I would have to look at mine to be sure, but I'm almost positive they are all hooked up to something.