Test Sequence Volkswagen Golf Mk3

1. Disconnect vacuum hose from secondary air injection solenoid valve.
2. Attach US 8026 hand vacuum pump to vacuum hose.
3. Disconnect pressure line from pneumatic valve.

Note. Do not use compressed air for the following check.

1. Connect auxiliary hose to pneumatic valve and blow into it. Pneumatic valve must be closed.
2. Operate hand vacuum pump. Valve must open and operate smoothly (without sticking).
3. Replace valve if necessary.