Vacuum System Leak Test

Fig. 4 Component Diagram:

Refer to component identification diagram, Fig. 4, when testing for vacuum leaks.
1. Remove trim panels and covers necessary to access throttle control element, near throttle pedal.
2. Disconnect vacuum line at pump and plug.
3. Hold down brake pedal to open vacuum vent valve.
4. Push in throttle control element diaphragm in and hold while releasing brake pedal to close vacuum vent valve.
5. Release throttle control element diaphragm, element must not move.
6. If element moves, repeat above test after isolating each component and circuit until leak is located.