Mitsubishi Stealth 1994 Import Service Manual page 1275

EMISSION CONTROL SYSTEMS -
Engine speed (rpm)
1 FU44!
Evaporative Emission Control System
(4) Connect the vacuum hose (red stripes) removed in (1)
above to P nipple of the throttle body as before.
(5) Disconnect the purge air hose from the air intake hose, and
plug the air intake hose. Then, connect the hand vacuum
pump to the purge air hose.
(6) Under the engine conditions shown below, check by
applying vacuum from.a hand vacuum pump.
When engine is hot - engine coolant temperature:
70°C (158°F) or higher
Applying vacuum Engine operating
375 mmHg Idling
(14.8 in.Hg.)
Sudden racing
PURGE PORT VACUUM CHECK
Check Condition
Engine coolant temperature: 80 - 95°C (176 - 205°F)
(1) Disconnect the vacuum hose from the throttle body purge
hose nipple and connect a hand vacuum pump to the
nipple.
(2) Start the engine and check to see that, after raising the
engine speed by racing the engine, purge vacuum raises
proportionately with the rise in engine speed.
NOTE
If there is a problem with the change in vacuum, it is
possible that the throttle body purge port may be clogged
and require cleaning.
Result
condition
Vacuum is maintained
Vacuum leaks