Mitsubishi 3000GT 1991, Service Manual

Page: 353 / 1146

EMISSION CONTROL Evaporative Emission Control System
Purge h o s e - - - - -
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.
E
8
Engine speed
(2) Start the engine and check to see that, after raising the
engine speed by racing the engine, vacuum remains fairly
constant.
NOTE
If there is no vacuum created, it is possible that the throttle
body port may be clogged and require cleaning.
PURGE CONTROL VALVE <Turbo>
INSPECTION
(1) Remove the purge control valve.
(2) Connect a hand vacuum pump to the vacuum nipple of the
purge control valve.
(3) Apply a vacuum 400 (15.7 and check
airtightness.
(4) Blow in air lightly from the canister side nipple and check
conditions as follows.
Hand vacuum pump vacuum
I
Normal condition
I
0 Air does not blow through
vacuum is applied)
200 (8.0 or more
Air blow through
I
(5) Connect a hand vacuum pump to the positive pressure
nipple of the purge control valve.
(6) Apply a vacuum of 400 (15.7 and check
airtightness.
PURGE CONTROL SOLENOID VALVE
INSPECTION
NOTE
When disconnecting the vacuum hose, make an identification
mark on it so that it can be reconnected to the original position.
Disconnect the vacuum hoses (non stripe and red stripe
hose) from the solenoid valve.
(2) Disconnect the harness connector from solenoid valve.
(3) Connect a hand vacuum pump to the nipple to which the
red-striped vacuum hose was connected.
TSB
Revision