The past week I've been smelling a slight amount of fresh fuel. Finally found it today. When the car is running, it's coming out of this canister from the rear. I can see the vapor coming out of it at idle. What is this part? It's the silver/zinc looking part which has like 1" hose coming in and out. Fuel vapor appeared to be coming out of the little slots. Can't be normal. I'm trying to figure out how to add a picture.