Most Auto Zone parts stores will read the system, turn off the light and tell you the probable problem and causes, which could be many.
A temporary misfire due to fuel delivery, (injectors) spark plug, spark jump from a worn wire, and don't forget the gas cap being worn and not providing the proper seal.
To reset the light yourself, just remove the battery terminal for a few minute and the light will reset, then after driving a few miles the computer will reset itself.
You can also spend about $50.00 and buy your own code reader and the instructions and results are provided.
One note of caution, a code reader for that early of car will not read on the later models. Advance auto parts sell these code readers pretty cheap.