I replaced the fuel filter recently and after driving it today it sprung a leak. I have driven it for about an hour or so since replacing the fuel filter. The obvious thing I felt to was to tighten the fittings. Even after this I could still hear a hissing pressure sound. I feel like it has something to do with the tank being full, hot outside etc etc. I have heard that their is supposed to be a pressure vent in a fuel system. Is this true, any ideas what I can replace to keep my fuel system from springing a leak again???

Thanks, I desperately need to get this thing back on the road.

William