Vaccum Line/Sensor on Back Driver's Side Head
So I just put the entire car back together after having the motor out. The sensor at the back of the passenger side head that has two vaccum ports on it - what is it, and where to those lines go? I know one of them goes to the T connection at the back of the intake manifold as a vaccum source. ...the other port has no line to attach to it that I can find.
I don't know if this is part of some system I no longer have on the car? I don't have EGR or AIR anymore. Can I just cap off the second vaccum port and go on down the road? Any help would be.... helpful.
I'm gonna 86 the whole thing and plug the HVAC vaccum line directly to the manifold.
Thanks!

