The spring inside your fuel door broke. Common problem for old Toyotas. To release your fuel door, lift the gas lever inside and cushion under the handle with something to keep the lever up and then go the fuel door and insert a credit card on the crack of the fuel door and open it manually.
You need to replace this one (gas filler door spring). The V metal part snap out of the plastic. Easy to replace.
Tuesday, November 4th, 2008 AT 12:59 PM