vacuum lines

Hey there. I just entered the world of Wrangler with a 90' YJ 2.5l. I am slowly but surely getting to know the guts of the system. I am in the process of replacing the vacuum lines, and I have found 1 mystery line that was not connected to anything upon purchase. It is the bottom line coming...

Hello, on my 89 yj 2.5L the evap canister has been removed and I have some high idle issues (1500rpm) I have traced the lines as per attached photo. I have several lines plugged off and a few just open to atmosphere and the pcv line is sucking air like crazy if I plug it with my finger the...