theres alot of carbon build up and..

The intake, plenum, and runners are wet with ( what I think ) fuel.
Its sort of oily to the touch but i believe its carbon mixed with fuel that gives it the texture.


I have the plenum and runners off. Should i let them dry out?

 

Its oil coming from your pcv system. Clean it all out with carb cleaner.

 

changed the pcv valve about a month ago though...
must be from the previous owner?