I just discovered one end of what I think is a vacuum line of some sort disconnected. The other end is attached to the center of the engine block on the throttle control side. I cranked the engine and while running could feel a vacuum being pulled on the loose end. Does anyone have any idea where the loose end is supposed to be attached? The hose is long enough to almost cross over to the other side of engine. I have gotten a lot of good advice off of this forum and I appreciate it. Could this loose line cause my wide open rpms to drop. This is a problem that I have been having lately. Please help me to find where this connects.