My '88 FJ62 is leaking fuel when the tank is full. I looked at it and noticed that there are 4 lines coming up from the tank (not the fill or vent line), go through the inner-fender well, and go up to a black box inside the rear cargo (behind the panel, passenger side rear). ???? They are rubber hose and have metal lines about 4 inches long that connect the rubber through the inner-fender. The lines are right next to the fill hose and the gas door release goes next to the black box. What is this box and how should I fix the hoses? Thank's for any help.