How do you reset computer on 1998 Chevy Cavalier?

A 1998 Chevy Cavalier doesn't have a computer in the same way a modern PC does. It has an Engine Control Module (ECM), also sometimes called a Powertrain Control Module (PCM), which is the computer that controls the engine. There's no "reset" button like on a PC.

What you likely want to do is one of the following:

* Reset the ECM: This clears fault codes and returns certain parameters to factory defaults. The method varies slightly depending on the exact engine and options in your Cavalier. The most common methods include:

* Disconnect the battery: Disconnect the negative (-) battery terminal for at least 15-30 minutes. This often clears temporary fault codes. Reconnect the terminal after the time has passed. This is the simplest and generally safest method.

* Use a scan tool: A scan tool (OBD-II scanner) can clear trouble codes from the ECM more effectively than disconnecting the battery. This is the best option if you have persistent issues.

* Reset the radio: If you're having trouble with the radio, that's a separate system with its own reset procedure, usually involving a sequence of button presses. Consult your owner's manual for the specific steps.

* Something else entirely: If you're experiencing a problem and think it might be computer-related, be more specific about the problem. For example, "My car is idling rough" or "My check engine light is on" will help determine the appropriate action.

In summary: Disconnecting the battery is the simplest way to attempt a "reset" of the ECM in a 1998 Chevy Cavalier. If that doesn't solve the problem, use an OBD-II scanner, or describe the specific issue you're experiencing for more targeted advice.