directly under the cruise control on the back side of the dohc ve is a short 2"-3" rubber hose that connects from the top intake plenum to the rear valve cover. at the base of the cover is a threaded object. what is this? i dont have any pics sorry.. this line looks like a old wet wrung up tee shirt. Its not very ez access. I think its a wrinkled vac line with a pcv valve on it. why is this line all strung up? Can this be a reason for my idle surge?

thanks