here is the procedure:
Disconnect the battery's negative terminal to reset/clear the computer's memory. Leave it disconnected for 30 minutes.
Disconnect the plug going to your idle motor which is located on the front of your throttle body.
Reconnect your battery's negative terminal.
Start the engine, and set the idle to the rpm you want with the stop screw on the bottom of the throttle body. (arrow)
Turn off the engine.
Reconnect the plug on the idle motor.
Make sure all accessories (radio, blower motor
, a/c, lights, etc) are off and start the engine.
Let engine run for two minutes.
Turn engine off and wait two minutes then restart engine and let idle for two minutes with all accessories on.
If everything was done properly the EEC-IV (read: computer) should have learned it's new idle.