On a 92, there are two located under the distributor and the thinner one is the sensor for the gauge. There is a third one by the upper radiator hose, but technically it is a "switch" -- short and fat.

If you pull off the electrical connector from the right one, the gauge should drop to zero, unless it is defective.

In any case, the Autozone website provides a guide for locating components --- it may be worth a try.

Good luck.