Thanks to yahoo answers, I now know what that mystery tube was, it is a tube that leads to the Positive Crankshaft Ventilation valve. It seems that normally gases are sent through this valve, to be recycled by the engine and prevent pressure build up.
So, I purchased a new one for about three dollars. The old valve (black) and the new one, both completely different shapes.
Here is the old "valve", it is nothing more than an empty plastic tube fitting that went where the PCV valve should go, I'm not sure what the deal is here.. if it was replaced at some point or not. Further, the kit I had also had empty tubes in it and none of them fit into the plug on the valve pan, they were all too small. They do fit over the actual PCV valve, so I know that is not there intention. So, it is back to researching but at least I know what a PCV valve is now and the basics of why it was there in the first place.
While I was at it, I checked the fuel line pressure by using a rag and pushing in the needle and nothing escaped. I purchased some engine starter, sprayed it into the air filter tube, and tried to start the engine, it cranked a few times but nothing to be impressed with. Thanks goes to yahoo users Bret W, and Joenusz for supplying me information regarding the PCV valve, and how to check the gas pressure. My Haynes repair manual did not show the correct location for the fuel pressure test port, so here it is for anyone out there looking for it, there should be a black cover over it.. If you can't find it, using your Haynes manual, check the drivers side just in front of the air intake manifold.(1999 3.8l)
I'm fairly sure it is the fuel pump at this point, because when I turned the ignition I wouldn't hear the fuel pump. Going by a story my brother had told me, I gave the gas tank a few taps and when I turned the key I heard the fuel pump turn on and the engine cranked for a little bit. Trying to repeat pounding on the gas tank, to get the fuel pump working again was fruitless.. but at least now, I know where to focus my effort at the moment, after I figure out why my PCV valve, was not really a valve to begin with and where to get the right part.
With all of that said, I really am having a good time figuring these things out. The car might be complete rubbish, but it keeps me occupied for a few hours and really hasn't been that expensive yet. My wife should be buying a new car soon, which means I will get my Saturn back, but I plan to continue working on the Windstar and learning how to repair my own car.
