All of my questions are numbered in the pictures.

Side Questions:
(5) If a plug didn't go to #4 then what does?
http://i33.tinypic.com/eisfpw.jpg

http://i33.tinypic.com/28ui810.jpg

#1. Vacuum.
#2. M/C solenoid.
#3. You will not get a reading there at idle. It's a ported vacuum pulloff. That means there's no vacuum with a closed throttle.
#4. No.