I have a hose that is a hard plastic line coming from the rear of the car area that is not hooked into anything. I have the raw gas smell that started when the dealership replaced the fuel pump in my car last year. I'm not sure if this line is supposed to be a vent line or what and was wondering if there are any diagrams out there that would help me to ID this line in hopes that I can get rid of the gas smell. I'd rather find out if this is the cause before I replace the canister. Thank you