Check Valve

Remove check valve and connect vacuum pump to Dark Blue nipple. When vacuum is applied, vacuum should leak. Connect vacuum pump to White nipple. When vacuum is applied, vacuum should hold.

Fig 1: Carbureted High Altitude Compensation System (Calif.)

Courtesy of CHRYSLER MOTORS.

Fig 2: Carbureted High Altitude Compensation System (Cordia & Tredia - Federal)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 3: Carbureted High Altitude Compensation System (All Others - Federal)

Courtesy of CHRYSLER MOTORS.