95 GTS - What is this plug?

As I was crawling underneath the car the other day to install new O2s, I happened to notice a plug in my passenger fender well not connected to anything. About a month ago I took the liner out to do some testing on the EGR system / valve / vac lines / solenoid. Anyway the liner is still out, leaving everything underneath exposed. I just happened to glance up and see this plug sitting there. Its not connected by fault of anything I've done, so have no clue really. Could it be for accessories maybe the car was never equipped with? Like cruise control maybe?

Anyone?

So interesting you said that. I looked it up and very first thing that I noted, was articles about faulty valve causing a gas smell inside the car. Which is exactly what I've been experiencing lately. How it burns your eyes a little bit and when I get moving it dissipates quickly. This was the article I stubbled across

http://www.themustangnews.com/conte...-odor-issue/nggallery/slideshow/#.W_RscuhKiM9


Just to verify, I resorted to my service manual and followed the diagram and sure nuff, its exactly what it is 'Purge Canister Valve'



But wait a min, that's for a 3.8 it says....... and I have a 5.0. But it clearly matches whats in the service manual. I traded the line and it connects to the vapor return tube on the canister. The line could be in better shape, little crackly and probably will replace it.




So if I look at the 5.0 diagram, it shows the Purge Canister Valve away from the firewall, on the passenger side fender apron with the charcoal canister towards the front bumper.




I'm wondering if this is one of Ford's wonder extras they threw in for free. As in the wiring harness is indeed for a V6, but the plug for the 5.0 was also supplied as part of the EGR vac harness. Kind of like how these cars are [OBD I] but they decided to include the [OBD II] port on it, even though its not connected to anything on the GT, but is on the V6

Just vac tested the valve and it failed, doesn't consistently hold vacuum and only has 8ohms of resistance