I was reinstalling all the hoses leading to/from my carbon vapor canister today and I noticed something interesting.  The short hose that connects to the steel line leading back to the fuel tank isn't simply a rubber hose.  In the attached photo, i'm referring to the rubber hose connected to the canister port labelled by a blue dot (Fuel Tank). As I was about to reinstall it I thought I'd blow into it just to make sure that it wasn't clogged and, surprisingly, I felt resistance that seemed like