Fuel Injected

Disconnect vacuum hoses from valve. Connect vacuum pump to valve nipple. See Fig 1 . With engine coolant temperature at 113°F (45°C) or less, vacuum should leak when applied. With engine coolant temperature at 176°F (80°C) or more, vacuum should hold when applied.

Fig 1: Testing Thermo Valve

Courtesy of CHRYSLER MOTORS.

Fig 2: EGR System (Colt Vista, Galant & Van/Wagon)

Courtesy of CHRYSLER MOTORS.

Fig 3: EGR System (Colt Turbo and Conquest)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 4: EGR System (Colt, Raider & Ram-50)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.