I have a 06 DF70 that I just replaced the Hi-p fuel sep. on. I have most of it back, but hit a bump that my book is not detailed on. On the manifold side of the motor toward the bottom left there is a little plastic silencer that snaps in a bracket with two like vacuum lines off of it. The book shows where the front line goes too, but I don't get where the other line goes?(well it does,but not clear on what to), My guess is its an open line that needs to be hi in the motor, not a good enough guess) The are no clamp marks on it and I don't recall removing it? Thanks for your time,