Caution: To check if the idle speed control valve is working, put your hand on the valve. When the engine is running, the valve should vibrate from power pulses.
Disconnect connector 2 for idle speed control valve. The figure shows the M20 engine, on the M50 engine the valve is located under the intake manifold.
Remove wire strap 3.
Release the idle speed control valve from the clamps and pull it out.