I am at a loss to make much of the diagram. I have been left with the 3 plugs in the picture, I believe 2 go in the manifold and 1 in the plenum but am unsure. If anyone can help it would be great. thankyou
The tee goes to the plenum and feeds the vapor canister plumbing and the tee on the firewall.
Diagrams courtesy of Tmoss & Stang&2birds
Vacuum diagram 89-93 Mustangs
eryuseful.co
See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring; Mustang FAQ - Wiring & Engine Info Everyone should bookmark this site.