[Doug Tatham]

The idel control valve attaches to the throttle body - the metal thing that the speedometer cable attaches to. Remove the intake air hose and the throttle body. The idle stabilizer is the thing that has a wire harness attached to it and is attached with phillips screws. Remove the idle stabilizer and spray it out with carborator cleaner. If I remember right, the valve slides side to side to allow air through. You may also want to clean out your EGR valve. It attaches to the backside of the intake manifold. The tube that leads to it is at the bottom of the intake manifold and gets blocked up with carbon deposits. You'll get an engine error code - EGR excessive flow- when this needs cleaning.

I just realized you said 1992, rather than 2002. I'm not sure how the stabilizer is set up on your model, but it acts as a bypass to the throttle body. On my VW it has hoses attached on either side and on my protege it is mounted to the throttle body.

The ECU is the engine control unit. It takes in info from all your sensors and controls the fuel mix. I've read that removing the battery and repeatedly applying the brakes will reset it, but I don't know anything about the source.