There is a nipple on the back side of the head, a vacuum feed of some sort. What is the purpose of it?
Also, is the ISV needed on this car? mine doesn't seem to be working regardless. When I unplug it and replug it, nothing changes.
Long story short, I'm having an idle issue, and I'm fairly certain it's vacuum related and would love to get rid of as many vacuum sources as possible.
Thanks in advance for the help.