Purge Control System Inspection - Mitsubishi 1989-1993 GALANT Service Manual

EMISSION CONTROL SYSTEMS -
Throttle body
<SOHC (1999 models)>
(1) Disconnect the vacuum hose (red stripes) from the throttle
body and connect it to a hand vacuum pump.
(2) Plug the nipple from which the vacuum hose was removed.
(3) Under the engine conditions described below, provide a
vacuum by using the hand vacuum pump, and then check.
When engine is cold-coolant temperature:
When engine is hot-coolant temperature:
Engine operating
condition
Idling
Within 3 minutes Try applying
after engine start
3,000 rpm
After 3 minutes
have passed after (14 in.Hg.)
engine start
3,000 rpm
TSB Revision
Evaporative Emission Control
Intake air temperature
Engine
control
module
Applying vacuum Result
375 mmHg
Vacuum is
(14 in.Hg.)
Vacuum leaks
vacuum
375 mmHg Vacuum will be main-
tained momentarily,
after which it will
leaks.
NOTE:
The vacuum will leak
continuously if the
altitude is 2,200
(7,200 ft.) or higher,
or the intake air
temperature is 50°C
I
maintained