MITSUBISHI SPYDER 1990 Service Repair Manual

ENGINE AND EMISSION CONTROL
4. Check the purge when
carried out several times. .
Standard value: Momentarily 20 (2.5 SCFH)
or more
5.If the purge flow volume is less thah the standard value,
check it again with the vacuum hose disconnected from
the EVAP canister.
If the purge flow volume is below the standard values,
check for blockages in the vacuum port and vacuum h ose,
and also check the evaporative emission purge solen oid
and the purge control valve.
If the purge flow volume is at the standard value, replace
the EVAP canister.
TSB Revision

(Turbo) and Engine>
PURGE CONTROL CHECK (PURGE FLOW CHECK)
ENGINE>17300140272
IntakeplenumThrottle body
From air cleaner
OFF
ON EVAP purge
solenoid
(ON: OPEN)
hose IPurge flow
indicator
Revision
EVAP canister
Disconnect the purge hose from the evaporative emis sion
(EVAP) canister, and connect the special tool (purg e flow
indicator) between the EVAP canister and the purge hose.
2. The vehicle should be prepared as follows before the
inspection and adjustment.
lEngine coolant temperature:
l Lights, cooling fan and accessories: OFF
l Transaxle: Neutral (A/T for
range)
3. Run the engine at idle for 4 minutes or more.

ENGINE AND EMISSION
4. Check the purge when sudden is
carried out several’
value: (2.5 SCFH)
more , __
5.If the purge flow, volume ‘is than the value,
check it again with the
hose from
the EVAP canister.
If the purge flow volume the
check for blockages in the vacuum
and also check the evaporative
and the purge control
If the purge flow volume is at the value, replace
the EVAP canister.
Revision

Engine (Turbo) Engine>
Vacuum
Enginespeed
TSB Revision
Vacuum
Engine speed
PURGE VACUUM CHECK
(Turbo)>
1. Disconnect the vacuum hose from the throttle body purge
vacuum nipple and connect a hand vacuum pump to
t h e n i p p l e .
2. Vacuum is kept constant despite the increased en gine
speed.
NOTE
If no vacuum is generated, the throttle body purge port
may be clogged.
Engine (Turbo)>
1. Disconnect the vacuum hose from the intake manif old
purge vacuum nipple and connect a hand vacuum pump
to the nipple.
2. Vacuum is kept constant despite the increased en gine
speed.
NOTE
If no vacuum is generated, the intake manifold purge
port may be clogged.

Engine (Turbo)>
Engine (Turbo)>
Engine>
.
EVAPORATIVE EMISSION PURGE --SOLENOID
CHECK
NOTE
When disconnecting the vacuum hose, place an
mark on it proper reconnection.
1. Disconnect the vacuum hose from the
valve.
2. Disconnect the harness connector.
3.Connect a hand vacuum pump to nipple (A) of the sol enoid’
valve (refer to the at left).
4. Check air-tightness by applying a vacuum with vo ltage
applied directly from the battery to the purge control sole-
noid. valve.
Battery voltage
Applied Not applied
Vacuum leaks
Vacuum
, .
5. Measure the resistance between the terminals of the
solenoid valve.
Standard value: 36-44 [at
TSB Revision

AND C O N T R O L (Turbo) and Engine>
Valve
PURGE CONTROL VALVE Engine
1. Remove the purge control valve.
2. Connect a hand vacuum pump to the vacuum nipple of the purge control valve.
3.Apply a vacuum of 53 (16 and check
ness.
4.Blow in air lightly from the evaporative emission c anister
side nipple and check conditions as follows.
Hand vacuum pump vacu-
umNormal condition
0 (0 (No vacuumAir does not blow through
is applied)
27
(8.0 or more Air blow through
5. Connect a hand
vacuum pump to the positive pressure
nipple of the purge control valve.
6.Apply a vacuum of 53 (16 and check
ness.
Revision
VOLUME AIR FLOW SENSOR, ENGINE COOLANT
TEMPERATURE SENSOR AND INTAKE AIR
TEMPERATURE SENSOR
Refer to GROUP Troubleshooting.
AIR CONDITIONING SWITCH
Refer to GROUP 55 Air Conditioning Switch.

EVAPORATIVE EMISSION CANISTER/FUEL TANK PRESSURE
RELIEF VALVE/PURGE CONTROL VALVE
REMOVAL AND INSTALLATION
Engine (Turbo)>
Pre-removal and Post-installation OperationBattery Removal and Installation
Removal steps
1. Battery bracket
2. Shift and con-
nection3. Vapor hose4. Connector5. Vapor hose 6. Fuel tank pressure relief 7. Vapor hose 8. Vapor hose
9. Check valve
1 0 . C l a m p ’
hose
12. Purge control
13. Evaporative canister
14. Evaporative emission canister
e r a s s e m b l y
TSB Revision

ENGINE AND EMISSION CONTROL Engine (Turbo) and Engine>
Engine>
and Post-installation OperationSplash Shield (R.H.) Removal and installation (Re-
fer to GROUP 42 Fender)
TSB Revision
Removal steps
1. Evaporative emission
2.Vent hose3.Vent hose4.Connector5.Vent hose6.Vapor hose7.Connector8. Evaporative emission purge hose
9.Vapor hose
3
I
10.Vent hose11.Filter bracket12.Air filter
13. Evaporative emission canister up-
per bracket
14. Evaporative
15. emission

Evaporative
emission
canister side
Rubber hose
F U E L T A N K ,
I N S T A L L A T I O N
Install the fuel relief
on the left.,
,
I..- ,
I N S P E C T I O N
FUEL TANK PRESSURE RELIEF VALVE SIMPLE .,
WARNING
To avoid bodily injury, do not breathe fuel
Attach a clean hose and tank
Inspection procedure,
Lightly blow from inlet A i r p a s s e s
(fuel tank side).slight feeling of
Lightly blow from outlet side.Air
resistance, , .
EVAPORATIVE EMISSION VENTILATION SOLENOID
CHECK
(1) Connect a hand vacuum pump to nipple (A) of the
solenoid.
Check airtightness by applying a vacuum with voltag e
applied directly from the ‘battery to
evaporative
emission ventilation solenoid. and
(3) Measure the resistance between the terminals of the
solenoid.
Standard value: 17-21 (at
TSB Revision

(Turbo) and Engine>
EXHAUST GAS RECIRCULATION
GENERAL INFORMATION
The exhaust gas recirculation (EG system lowers
the nitrogen oxide
emission level. When the
air/fuel mixture combustion temperature is high,
a large quantity of nitrogen oxides is gener-
ated in the combustion Therefore, this
system recirculates part of emission gas from the
exhaust port of the cylinder head to the combustion
OPERATION
When the engine coolant is low, when
the engine is at idle or when a wide open throttle
operation is performed, the EGR valve is kept
closed, achieving no EGR.
The manifold differential pressure sensor is locate d
in the intake manifold plenum. This sensor detects
variations in the manifold pressure when
the EGR solenoid is momentarily operated. If the
manifold negative pressure the EGR sys-
tem is normal.
SYSTEM DIAGRAM
Engine (Turbo)>
(EGR) SYSTEM17300520205
chamber through the intake manifold to decrease
the mixture combustion temperature, result-
ing in reduction of
The EGR flow rate is controlled by the EGR valve
so as not to decrease the
In normal vehicle operation performed after warm-
ing up of the engine, the EGR valve is opened
to carry out EGR.
The ECM uses this to check the operation of the, EGR system. If a problem is found, the check en-’
indicator light illuminates to warn
the driver that a problem has occurred.
EGR valve
relay
EGRsolenoid
Engine control
module
Isensor
Engine coolant
temperature sensor
sensor
Manifold differential
TSB Revision
pressure sensor,