Usually, it is a faulty sensor(sender), as the contact fingers or resistor board wear. If you had a short or an open, more than likely you would see an extreme, either reads full all the time, or empty all the time. There could be another possible to consider, and that is a sticking gauge needle. I am not sure on your vehicle if, when you key it on, all the gauges go high, then low, and to there normal reading positions. This could eliminate a gauge needle sticking. Another option is opening and shorting the fuel sensor wires at the connector, to drive the gauge low/high.
Friday, July 22nd, 2011 AT 5:03 PM