I can see a port (hole) in the intake manifold opening. It looks like there is a hose behind it that feeds it. What the heck is this port all about?

 

think it goes to your passenger side pcv valve, just part of the vacuum system.

Trace the line shouln't be too hard to see where it goes. Does the line say fuel on it? its something else if thats the case.

 

Grinomyte!

I took a lot of pictures today. It is dark out and I am too lazy to go out and trace it right now. I think you may be correct as I seem to remember some 3-way nonsense near the PCV valve. I have been comparing my pictures to yours on the other website.

http://www.fordf150.net/howto/throttlebodyclean.php



Thanks for the suggestion! DUH!

I will post again tomorrow asking for help tying my shoes. hehe.

 

yeah the 5.4 and 4.6 are a tad different but the basic same lines should be there. Looks like PCV to me.

 

thats where you hook the NO2

 

NO2 makes me laugh at the dentist. Will NO2 make my engine giggle?

 

Thanks Grinomyte. I traced it and the hose on this port goes to the PCV valve. There is a "Y" connector near the PCV valve and the other line goes to the Intake Plenum.