[yaz4real]

You stated you have a check engine light. Your 1993 car has a OBD I diagnostic. Take a paper clip to the A/B on the connector located to the left and down from your steering wheel. It will flash 1 and then 2 and then flash all other codes before closing out with the 1-2 code. Get those code #s and post them here. Next, your high idle is likely related to IACV located right next to the TPS. You are better off to remove the entire throttle body and clean it out good. Remove the electrical connectors, the accelerator cable and vacuum hoses. The throttle body comes off with the 3 10mm bolts as looking into the unit after taking the air intake assembly. The gasket sandwiched between are generally reusable however they are not costly to replace from a auto parts store. Be careful around the IACV when you remove it since it is a servo-motor with a spring. It has an o-ring also. A can of carb cleaner and some old toothbrushes are recommended. Do not soak the tps or iacv. Just apply and wipe off.

You will see why the high idle when you see the throttle butterfly from the other end.