Ok well here it is Sunday night after my car had sat in my garage for a couple hours i went out there just to get a drink out of the fridge and i noticed a horrible gas smell..it appeared that the fuel line was leaking but i checked the line and no holes or anything looks like it had recently been replaced. But when looking around I noticed a tube comming out of the gas tank connected to a UFO looking piece located at the driver side rear wheel....well the parts of the UFO shaped thing were completely seperated. I smelled a strong odor around this area. Could this cause the gas odor? Should i go about trying to push them back together or should I buy a new part? Also could this cause gas to drip down on the lines and drip off?

it lets the PSI out when your filling your tank.... etc etc etc....

just push it back together, and put it back, mines the same way im pertty sure thats why i get a smell of gas here and there....

Pretty much just a pressure relieve valve.. Keeps it from building pressure when filling like stated above. but also prevents a vacuum conditino in the tank.. which would make our poor fuel pumps cry....