Fuel Injected

Disconnect vacuum hoses from valve. Connect vacuum pump to valve nipple. See Figure . With engine coolant temperature at 113°F (45°C) or less, vacuum should leak. With engine coolant temperature at 176°F (80°C) or more, vacuum should hold. If valve does not operate as specified, replacement is necessary.

Fig 1: Testing Thermovalve (Carbureted)

Courtesy of CHRYSLER MOTORS.

Fig 2: Testing Thermovalve (Fuel injected)

Courtesy of CHRYSLER MOTORS.

Fig 3: EGR System (Colt Vista)

Courtesy of CHRYSLER MOTORS.

Fig 4: EGR System (Colt Turbo)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 5: EGR System (Colt, Raider & Ram-50)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.