Ok, just got in from a 98 mile trip. As I pulled in I somehow heard a hissing-type noise over the sound of my exhaust. I got out to check and it seemes to be coming from the drivers side rear over the gas tank (where the lines go in, but I can not see up into there). what the heck could this be, is it dangerous, how do i make it go away? Your advice is appreciated! jered