Where is the idle adjustment on a 1991 Toyota 3.0?

On a 1991 Toyota with a 3.0-liter engine, the idle adjustment is typically located on the throttle body. Look for a screw or a knob on the throttle body assembly that controls the idle speed. It may be necessary to access it from the top or side of the engine, depending on the vehicle's configuration. Always refer to the vehicle's service manual for specific instructions and settings.