Mitsubishi 3000GT 1991, Service Manual

Page: 358 / 1146

EMISSION CONTROL
Exhaust Gas Recirculation System Catalytic Converter
(4) Apply a vacuum and check for air-tightness when voltage
applied directly to the EGR control solenoid valve and when
the voltage is discontinued.
Battery voltage Result
When applied
When discontinued
Vacuum is maintained
Vacuum leaks
Measure the resistance between the terminals of the
solenoid valve.
Standard value: 36 44 [at
AIR-FUEL RATIO CONTROL (MPI) SYSTEM
l
To inspect the air-fuel ratio control (MPI) system, refer to
3 Service Adjustment Procedures.
l
For detailed information concerning the illumination pattern
of the malfunction-indicator light and other aspects of the
self-diagnosis function, refer to GROUP 13 -Self-diagnosis.
REMOVAL AND INSTALLATION
Refer to GROUP 15 Exhaust Pipe, Main Muffler and Catalytic
Converter.
INSPECTION
Inspect for damage, cracking or deterioration. Replace if faulty.
Caution
1. Operation of any type, including idling, should be
avoided if engine misfiring occurs. Under this condition
the exhaust system will operate at abnormally high
temperature, which may cause damage to the catalyst
or underbody 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 tune up according to manufac-
turer’s specifications should be made to correct the
conditions as soon as possible.
T S B R e v i s i o n