1989-Montero · emission system · страница 32 из 38 · Открыть оригинал PDF ↗
AIR-FUEL RATIO CONTROL (MPI) SYSTEM
NZSICAF
a To inspect the air-fuel ratio control (MPI) system, refer to
GROUP 14 - service Adjustment Procedures.
l For detailed information concerning the illumination pat-
tern of the malfunction-indicator light and other aspects of
the self-diagnosis function, refer to GROUP 14 - Self
Diagnosis.
CATALYTIC CONVERTER REMOVAL AND INSTALLATION
NZSICSF
For removal and installation procedures, refer to GROUP 11 -
Exhaust Pipes and Main Muffler.
Проверка
Check for damage, cracks or fusion and replace if faulty.
Caution
1. Operation of any type, including idling, should be avoid-
ed if engine misfiring occurs. Under this condition the
exhaust system will operate at abnormally high
temperature, which may cause damage to the catalyst
or under-body parts of the vehicle.
2. Alteration or deterioration of ignition or fuel system or
any type of operating condition which results in engine
misfiring must be corrected to avoid overheating the
catalytic converters.
3. Proper maintenance and tuneup according to manufac-
turer’s specifications should be made to correct the con-
ditions as soon as possible.
EXHAUST GAS REClRCULATiON (EGR) SYSTEM
INSPECTION <Vehicles with a manual transmission> -’
(II Disconnect the vacuum hose (green stripe) from the EGR
valve and connect, via a three-way terminal, a hand vacuum
pump.
(2) Check the following points while the engine is cold (engine
coolant temperature 60°C (140°F) or lower) and while it is
hot (engine coolant temperature 70°C (158°F) or higher).
When engine is cold
Engine condition Normal condition
Depress the accelerator pedal Negative pressure (vacuum) no
quickly and race the engine. change (barometric pressure)
When engine is hot
Engine condition Normal condition
Depress the accelerator pedal Negative pressure (is&urn)
quickly and race the engine. temporarily increases to 20 kPa
115.9 in.Hg) or higher.
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