Vacuum line missing?

[turblown]

2003 XLT, V6 4.0

Changing out spark plugs & wires today and I noticed it looks like I have a vacuum line missing. I can't tell where it would come from. I looked all over for a loose vacuum line and could not find one. Car seems to run fine. Is this part supposed to be like this? What is it's function? Thanks in advance.

 

[NudgE^SIKBRO]

That looks like it has had something on it but occasionally there will be one that just goes to atmosphere for a vent.

 

[corkey]

it is the end of the activator arm for the coolant bypass,, it is not a nipple,,

 

[1992fordgreen]

^^what he said, nothing to worry about.

 

[turblown]

Okay good. Thanks for the replies. I get a little worried when I see something clean under the hood.