Today I took off the TB and the fuel Injectors and did a real good cleaning on them.
This car has 36,600 miles and these things were very dirty. While it was apart I dumped some Sea Foam into each cylinder through the Injector holes. I put everything back together and the car is running 100X better now.

I was having a bad miss when it was Idling. When I started the car it smoker like it was on fire until all of the crud and Sea Foam burned out.

My question is?????
There is a small Vacuum nipple in the Valve cover and I do not have a loose line to connect to it. I do not remember removing anything from this nipple. This connector (Nipple) is right next to the larger hose on the left (While standing in front of the car looking at the motor) back side of the Valve cover directly across from the TB.
Can anyone tell me what is supposed to connect to this nipple?

Thanks!!