I just fixed the same issue too. Look for a 3 way vacuum adapter on the manifold (kind of behind the brake fluid res.) mine came off right there. BTW that hose comes out of the firewall (drivers side)and runs up between the fender and the coolant tank, so look for it there.
just got home from dropping my brother off in college (I'm almost 17) and took a look around and found the 3 way vacuum adapter that you spoke off and one of the hoses was off so i connected it and it worked! But on the bad side i noticed an unconnected hose, it was in the same area as the fuse box but way closer to the light. The part that the hose was attached to is completely dis-attached to anything secure, I'm going to to look into this and maybe start a new thread. :/
thanks for the help!