you have a 92 model which will be OBD1. you can run the codes yourself.
Troublcodes.net Trouble Codes OBD & OBD2 Trouble Codes and Technical info & Tool Store. By BAT Auto Technical
depending on the mileage and the gas, you might look into doing a rebuild on the throttle body. the kit is cheap and fairly easy if you do exactly what the instructions tell you to do. somewhat time consuming, you can have it tore down and back on the engine in a couple of hours.