1991 MITSUBISHI ECLIPSE fuel

-.
EMISSION CONTROL SYSTEMS - Troubleshooting
TROUBLESHOOTING
., ,_
SymptomProbable causeRemedy
Engine will not start or hard toVacuum hose disconnected or damaged
Repair or replacestart
The EGR valve is not closedMalfunction of the purge control solenoid
valve
Rough idle or engine stalls
The EGR valve is not closed.
Repair or replace
Vacuum hose disconnected or damagedMalfunction of the positive crankcase
ventilation valve
ReplaceMalfunction of the purge control system
Check the system; if there is a problem,
check its component parts
Engine hesitates or poor accel-Malfunction of the exhaust gas
recircula-Check the system; if there is a problem,
erationtion systemcheck its component parts
Excessive oil consumptionPositive crankcase ventilation line cloggedCheck positive crankcase ventilation sys-tem
Poor fuel mileageMalfunction of the exhaust gas recircula-Check the system; if there is a problem,tion systemcheck its component parts

25-4EMISSION CONTROL SYSTEMS - Vacuum HosesVACUUM HOSES
VACUUM HOSES ROUTING 1.8L Engine>
hW7JA-
r”
w..’L:
Light blueR:
RedB:
BlackCanister,Purge control
/solenoid valve
Fuel pressure
regulator
Vehicle front
3EM0123
<-LCalifornia- 1.8L Engine>
CanisterThrottle body
aVehicle front G: Green
Y : Yellow
L : Light blueR: Red
B : Black/EGR valve
-Fuel pressure
regulator
3EM0124

EMISSION CONTROL SYSTEMS - Vacuum Hoses2515 Canada-2.0L DOHC Engine Non-Turbo>
Purge control
solenoid valve
Canister
Therm0valve
G: Green
Y : Yellow
L : Light blueR: Red
B : Black
nVehicle frontFuel pressure
regulator6EM0191

G: Green
Y : YellowPurge control
solenoid valve
Cani
EGR controlsolenoid valve
EGR valve
L : Light blue
R: Red
B : BlackVehicle frontFuel pressure
regulator
6EM0192

25-6EMISSION CONTROL SYSTEMS - Vacuum Hoses Canada-2.0L DOHC Engine Turbo>
G: Green
Y : Yellow
L : Light blueR: Red
B : Black
W: White
Purge control valvg
Purge controlFuel pressure control,solenoid valve/solenoid valve
Therm0 valve’
el pressure regulator
Turbocharger
vvasre gate actuator Waste gate control
solenoid valveVehicle front
6EM0222

G: Green
Y : Yellow
L : Lrght blueR: Red
B : Black
W: White
1sPurge control valve
&+
Air cleanerFuel pressure control
solenoid valve.
Purge control
solenoid valve\Fuel pressure regulator
Waste gate control
solenord valve
Waste gate actuatorv.,~~‘~y:‘;7Vehicle front
6EM0223

25-14EMISSION CONTROL SYSTEMS- Evaporative Emission Control System
(5) Measure the resistance between the terminals of the
solenoid valve.
Standard value: 36-44
Q [at 20°C (68OF)]_
6EM137
AIR FLOW SENSOR, ENGINE COOLANT TEMPER-
ATURE SENSOR AND INTAKE AIR TEMPERA-
TURE SENSORTo inspect these parts, refer to GROUP
14-MPI System
Components.‘.
AIR CONDITIONER SWITCHTo inspect the air conditioner switch, refer to GROUP
24’--AirConditioner Switch.
OVERFILL LIMITER (TWO-WAY VALVE)N2BlBE&To inspect the overfill limiter (two-way valve), refer to GROUP
14-Fuel Tank.
CANISTERNzslBmTo inspect the canister, refer to GROUP
14-Fuel Line and
Vapor Line.
FUEL FILLER CAP INSPECTIONNZSIBJACheck the gasket of the fuel filler cap, and, the filler cap itself,
for damage or deformation; replace the cap if necessary.

25-20Exhaust Gas Recirculation (EGR) System/EMISSION CONTROL SYSTEMS - ‘catalytic Converter(5) Measure the resistance between the terminals
of- the Standard value: 36-44
Q [at 20°C (68OF)l
6EM0188
AIR-FUEL RATIO CONTROL (MPI) SYSTEM &CAD
lTo inspect the air-fuel ratio control (MPI) system, refer to
GROUP 14 FUEL SYSTEM-Service Adjustment Proce-
dures.
lFor detailed information concerning the illumination patternof the malfunction-indicator light and other aspects of the
self-diagnosis function,refer to GROUP 14 FUEL
SYSTEM-Self Diagnosis.
CATALYTIC CONVERTERN25lCBHa
INSPECTION.
Inspect for damage, cracking or deterioration. Replace if faulty.
Caution1. Operation of any type, including
idjing, should be
avoided if engine misfiring occurs. Under this conditionthe exhaust system will operate at abnormally ‘high
temperature, which may cause damage to
the”Catalystor underbody parts of the vehicle.
2.Alteration or deterioration of ignition or fuel system, or
any type of operating condition which results in enghtemisfiring must be corrected to avoid overheating the
catalytic converters.
3. Proper maintenance and tune up according to manu-
facturer’s specifications should be made to correct the
conditions as soon as possible.