Is there a way to clean out an old fuel tank. I just got my 65 f100 running and it will not hold an idle. The fumes from the gas stinks really bad. I dumped the tank and there was about 5 gallons of old gas in it and when the truck runs on this gas the fumes burns your eyes and lungs. Im hoping this is the problem. The tank has corrosion in it and the float on the arm was missing. Must have corroded away.