Ok always wanted a jeep and finally got one. It's a 91 in great shape, however, I decided to put some fuel in since the gauge read 1/2 tank. It took about 15 gallons, and the needle pointed way past the full mark. the needle never seems to want to read much lower then 1/2 a tank. since I am pretty sure that the tank is not 30 gallons, I wondered if it was an easy repair (have lots of basic repair experiance), or if it was a gauge problem... any thoughts would be great.