themollyface

The day I got my car I put 20 bucks in gas in which brought it up to half full, as soon as I put the gas in I could smell unburnt gas!!!! After looking around to see what was causing this I noticed on the back left side close to my tier it was indeed leaking what I believe was gas. Also the CEL was on. Well I took her to the dealer and the ''fixed'' the leak and the CEL was no longer showing up. A day or two later I noticed the gas smell again, so we look under and there is no gas dripping. When the tank gets down to a quarter the smell is no longer present, untill I put about 20 to 25 bucks in and its at the half way mark. And the smell returns!!! Oh and the CEL back on. Can anyone tell me what this is so when I take it back again, I can tell the exactly what the problem is.