Mitsubishi Stealth 1994 Import Service Manual page 1280

EMISSION CONTROL SYSTEMS -
Exhaust Gas Recirculation (EGR) System
EGR SYSTEM INSPECTION <California - Non
Turbo, Turbo>
(1) Disconnect the vacuum hose (green stripe) from the EGR
valve, and connect a hand vacuum pump through the
three-way terminal.
(2) Regarding cold condition [coolant temperature: 20°C (68°F) L'
or less] and warm condition [coolant temperature: 70°C
(158°F) or more] of the engine, check the following two
points:
<Cold condition of engine>
<Warm condition of engine>
(3) Disconnect the three-way terminal, and connect the hand
vacuum pump to the EGR valve.
(4) When a negative pressure of 230 mmHg (9.1 in.Hg.) is
applied during idling, check that the engine stops or idles
unstably.
EGR VALVE CONTROL VACUUM CHECK
<California - Non Turbo, Turbo>
Check Condition
Engine coolant temperature: 80 - 95°C (176 - 205°F)
(1) Disconnect the vacuum hose from the throttle body EGR
vacuum nipple and connect a hand vacuum pump to the
nipple.