I bought my 95 f-150 xlt from my grandma. it was my grandfathers that past a year ago. I don't think my grandma drove it much since then. when I bought it from her a couple weeks ago she said I don't use the front tank cause the locking gas cap broke and i couldn't get it off. So I used the rear tank for a week till I got the front tank gas cap off and today I went to fill the front tank up and it took about 1 1/2 gallons and it probably spit out about half that. when I started to fill it up it sounded like air was going in to and all of a sudden all this gas started coming out. I pulled the gas handle out and gas was still coming out the tank like it was full but it wasn't it was empty I checked first. I just filled the rear tank up too. Is there something wrong with the front tank cause it hadn't been used in awhile?