You can disconnect the battery (negative terminal) for about 30 seconds, reconnect it and drive the car normally. The ECM will "relearn" idle and other parameters as you drive.
There is also a single wire connector on the passenger side between the battery and the suspension strut mount. It comes out of the harness, through the connector, and back into the harness. Disconnecting this wire will also clear the ECM memory, but will preserve your radio presets and clock. Unhook it for 30 seconds, reconnect, and go for a drive.
Rod Schneider, Woodstock, Ga.
"You can't have too many toys!"
1988 Fiero GT
1966 Porsche 911
Van's RV-6 airplane-under construction