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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
G65434Courtesy of CHRYSLER MOTORS.
Fig 2: EGR System (Cordia & Tredia)
G65435Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Fig 3: EGR System (Galant & Van/Wagon)
G65436Courtesy of CHRYSLER MOTORS.
Fig 4: EGR System (Mirage Turbo & Starion)
G65437Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Fig 5: EGR System (Pickup, Mirage & Montero)
G65438Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.