Fuel vapor from vent tube

[coyotegray]

I haven't driven my truck all winter and got it out yesterday to go over everything and get it ready for a parade Saturday.

While troubleshooting an oil leak I noticed, what looks like an unusual amount of vapor from the vent tube.
Smells like fuel.. My pump is bypassed.. Any ideas..?

See video..
http://www.youtube.com/watch?v=6QdS5lGP4eM&feature=youtu.be

 

[patracy]

That's the road draft tube. The vapor you're seeing is engine blowby.

 

[coyotegray]

I understand that. It may be the temp outside but i haven't noticed that much before..

 

[patracy]

Condensation that has accumulated over the winter possibly?

 

[gimpyrobb]

If you haven't run it in a while, get her out on the road for an hour or two, preferably with a load. It will clear right up.

 

[Sneaker]

Crankcase vent tube... +1 gimpyrobb's advice