Purge Control System Check <Mpi; Purge Port Vacuum Check <Gdi - Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement

17-16
ENGINE AND EMISSION CONTROL –
Red stripe
Purge port
vacuum nipple
Vacuum
Engine speed (r/min)
PURGE CONTROL SYSTEM CHECK <MPI>
1. Disconnect the vacuum hose (red stripe) from the throttle
body and connect it to a hand vacuum pump.
2. Plug the nipple from which the vacuum hose was removed.
3. When the engine is cold or hot, apply a vacuum while
the engine is idling, and check the condition of the engine
and the vacuum.
Plug
When engine is cold
(Engine coolant temperature: 40 C or less)
When engine is hot
(Engine coolant temperature: 80 C or higher)
NOTE
*:
PURGE PORT VACUUM CHECK <GDI>
1. Disconnect the vacuum hose (red stripe) from the intake
manifold purge vacuum nipple and connect a hand vacuum
pump to the nipple.
2. Start the engine and check that the vacuum remains fairly
constant after racing the engine.
NOTE
If vacuum changes, it is possible that the intake manifold
purge port may be clogged and require cleaning.
Emission Control System
Vacuum Engine condition
53 kPa 3,000 r/min
Vacuum Engine condition
53 kPa At idle
3,000 r/min
The vacuum will leak continuously if the atmospheric
pressure is approximately 77 kPa or less, or the temperature
of the intake air is approximately 50 C or higher.
17300140166
Normal condition
Vacuum is
maintained
Normal condition
Vacuum is
maintained
Vacuum will leak
for approximately
3 minutes after
the engine is
started. After 3
minutes have
passed, the
vacuum will be
maintained
momentarily, after
which it will again
leak.*