1991 MITSUBISHI ECLIPSE Service Manual

INTAKE AND EXHAUST- Exhaust Manifold <2.0L DOHC Engine (Non-Turbo) >11-27
EXHAUST MANIFOLD < 2.0L DOHC Engine (Non-Turbo) >
REMOVAL AND INSTALLATION,lcIii3\
I-**1
steps
1.Condenserfanmotor
2. Self locking nut3.Gasket
4. Exhaust manifold cover (A)12-15
Nm9- 11 ft.lbs.
06AOl56
5. Oxygen sensor6. Self locking nut
7. Engine hanger
8. Exhaust manifold9. Exhaust manifold gasket
0. Exhaust manifold cover
(B)
NOTE(I) Reverse the removal procedures to reinstall.(2) +* : Refer to “Service Points of Removal”(3) 0 : Non-reusable parts
NllNA6
SERVICE POINTS OF REMOVALNllNSAH
5. REMOVAL OF OXYGEN SENSOR
Disconnect the connector of the oxygen sensor, and installthe special tool
to the oxygen sensor.
Then, using an offset (box-end) wrench, remove the oxygen
sensor.
INSPECTIONNllNCALl
Check the following points; replace the part if a problem is
found.EXHAUST MANIFOLD
Check for damage or cracking of any part.EXHAUST MANIFOLD GASKET
Check for flaking or damage of the gasket.

11-28INTAKE AND EXHAUST - Exhaust Manifold ~2.0~ DOHC Enoine (Turbo)>
EXHAUST MANIFOLD <2.0L DOHC Engine (Turbo)>
REMOVAL AND INSTALLATION
Pre-removal Operation*Draining Engine Coolant(Refer to GROUP O-Mainte-nance Service.)*Draining Engine Oil(Refer to GROUP O-Mainte-nance Service.)
Rennova1 steps
1.Condenser fan motor assemblyOxygen sensor connectorEngine oil level gauge guideO-ring
\30-40 Nm22-29 ft.lty3. & (
EJ\\=a-50 N
4 .ri29-38 ftk.
,
Post-installation Operation@Filling Engine Oil(Refer to GROUP O-Mainte-nance Service.)@Filling Engine Coolant(Refer to GROUP O-Mainte-nance Service.)NllNA-C
130 25-30 Nmd/18-22 ft.lbs.
;:4.
s5:7.
::10.Ii.12.13.14.15.
Connection for air intake hose
Connection for vacuum hoseConnection for vacuum hoseConnection for air hose AHeat protector AHeat protector 6Power steering oil pumpOil pump bracketSelf-locking nut
Engine hangerEve bolt
16. Gasket17. Connection for water hose
19IBWI 18. Connection for water pipe B19. Self-locking nut20.
Gasket
05Ao15421.
Exhaust manifold22. Exhaust manifold gasket23.
Ring24. Gasket
NOTE(1) Reverse the removal procedures to reinstall.(2) +, : Refer to “Service Points of Removal”.(3) l * : Refer to “Service Points of Installation”(4) m : Non-reusable parts

INTAKE AND EXHAUST - Exhaust Manifold II-28
OlAO552
05K55;,
SERVICE POINTS OF REMOVALNllNBAl
11. DISCONNECTION OF POWER STEERING OIL PUMP
:
Disconnect the oil pump with hoses from the bracket.
NOTE
The removed power steering oil pump should be fastened
(by using rope, etc.) in a position that will not interfere with
the removal/installation of the exhaust manifold.
lNSPECTlONNllNCALl
Check the following points; replace the part if a problem is
found.EXHAUST MANIFOLD
Check for damage or cracking of any part.EXHAUST MANIFOLD GASKET
Check for flaking or damage of the gasket.
SERVICE POINTS OF INSTALLATIONNllNQAG
18. INSTALLATION OF WATER PIPE (BI
Before installing to the water inlet pipe, apply machine oil to
the inner surface of the pipe flare.

lNTAKE AND EXHAUST _ Exhaust Pspe and Main Mufflerc 1.8L Engine, 2.0L DOHC Engine (Non-Turbo) >
EXHAUST PIPE AND MAIN MUFFLER
< I .8L Engine, 2.0L DOHC Engine (Non-Turbo)>
REMOVAL AND INSTALLATIONN1lRA-A
021’
IO-15 Nm7- 11 ft.lbs.
IO-15 Nm 22-29 ft.lbs.7- 11 ft.lbs.
OSAO144
30-k) Nm22-29 ft.lbs.40-60 Nm29-43 ft.lbs.30-&o
Nm22-29 ft.lbs.
Removal steps
1.Protector
2.Gasket
3.Hanger
4.Main muffler5. Moulding <2.0L DOHC engine (Non-Turbo)>
6.Hanger bracket
7. Rear heat protector panel8.Self locking nut9.O-ringIO. Hook11. Bracket12.Stopper
13.Hanger bracket14.Hanger15. Protector
16.Hanger bracket
17.Center exhaust pipe
18.Gasket
19.Catalytic converter
20. Gasket21. Self locking nut
22.Hanger23..Front exhaust pipe24.Gasket25. Front floor heat protector panel
NOTE(I 1 Reverse the removal procedures to reinstall.(2) q : Non-reusable parts
INSPECTIONNHRCAHOl Check
the mufflers and pipes for corrosion or damage.
l
Check the rubber hangers and rubber O-rings for
deterioration or damage.
l Check
for gas leakage from mufflers and pipes.

INTAKE AND EXHAUST - %%%%z~~:~?&!!!%11-31
EXHAUST PIPE AND MAIN MUFFLER
i<2.0L DOHC Engine (Turbo)>
REMOVAL AND INSTALLATIONNllRAB
_h..
IO-15 NIT
5i /
IO-15 Nm7- 11ftlbs.22-29
ft.lbs.
40-60 NmG-60 Nm29-43 ftlbs.29-43 ft.lbs.-1
3’
IO-15 Nm7-l 1 ftlbs.05AO145
IO-15 Nm7-l 1 ft.lbs.05AO168
IO-15 Nm7-l 1 ft.lbs.
IO-15 Nm7-l 1 ft.lbs.
40-60 Nm29-43ftlbs.VIO-15 Nm7- 11 ft.lbs.
\30-40Nm22-29ftlbs.

Removal steps
1.Protector
2.Gasket3.Hanger4.Main muffler5.Hanger bracket6. Rear heat protector panel
7. Self locking nut
8.O-ring
9.Hook10.Bracket11.Stopper12.Hanger bracket
13.Hanger14.Protector15.Hanger bracket
16. Center exhaust pipe17.Gasket18.Catalyticconverter19.Gasket20. Self locking nut21.Hanger22. Front exhaust pipe
23.Gasket24. Front floor heat protector panel
NOTE
t(1) Reverse the removal procedures to reinstall(21 q : Non-reusable parts
INSPECTIONNllRCAHl
l Check the mufflers
and pipes for corrosion or damage.0
Check the rubber hangers and rubber O-rings for
deterioration or damage.0
Check for gas leakage from mufflers and pipes.

14-IFUEL SYSTEM
CONTENTS
AUTO-CRUISECONTROLSYSTEM...........................................109AUTO-CRUISECONTROL.......................................................140SERVICEADJUSTMENTPROCEDURES..............................135Accelerator Cable, Throttle Cable and Auto-cruise
ControlCableInspectionandAdjustment........................136Auto-cruise
ControlSystemInspection.............................135lndrvrdualPartsInspection..................................................137SPECIFICATIONS.....................................................................109GeneralSpecifications.......................................................109ServiceSpecifications
.........................................................109Torque Specrfications..........................................................109TROUBLESHOOTING...............................................................110Auto-CruiseControlCircurt................................................128Auto-cruise
ControlComponentsLocation........................126Auto-cruise Control Related Harnesses
.............................125Check Chart
........................................................................114Input Check.........................................................................123Self-diagnosis
Check..........................................................121Troubleshootrng
Quick-referenceChart..............................110ENGINECONTROL.......................................................................105ENGINECONTROL..................................................................107--SERVICEADJUSTMENTPROCEDURES..............................106Accelerator Cable Inspection and Adjustment..................106Accelerator Switch Inspectron and Adjustment................106SPECIFICATIONS.....................................................................105Lubricants.............................................................................105Sealant.................................................................................105ServiceSpecifications
..........................................................105TorqueSpecifications..........................................................105TROUBLESHOOTING...............................................................105FUELSYSTEM..............................................................................2FUELFILTER............................................................................104FUELLINEANDVAPORLINE..............................................102FUEL PUMP, FUEL GAUGE UNIT ANDOVERFILL LIMITER(TWO-WAY VALVE).............101FUEL PUMP, FUEL GAUGE UNIT ANDOVERFILL LIMITER (TWO-WAY VALVE).............99FUELTANK.............................................................97FUELTANK..............................................................93INJECTOR.................................................................................83MPISYSTEMINSPECTION<1.8LEngine>.......................56AirConditioner
Switch........................................................64Air Conditioner Power Relay
..............................................67Components
Location......................................................56
ControlRelay
.................................................................66EGRControlSolenoidValve...............................................67EGRTemperatureSensor..................................................64Engine Coolant Temperature Sensor
.................................62IdlePosrtionSwitch
...........................................................63IdleSpeedControlServo
.............................
....................65InhibitorSwitch....................................................................65hjeCtOrS................................................................................65IntakeAirTemperatureSensor..........................................6’2MalfunctionlndtcatorLight
..........................................58MotorPosition
Sensor................................................63OxygenSensor
.................................................................64Power Steering 011 Pressure Swatch...........................65PowerTransistor
................................................................67PurgeControlSolenoidValve.........................................67
Self-Diagnosis.......................................................................
ThrottlePositronSensor.....................................................
Vehicle Speed Sensor.........................................................MPI
SYSTEMINSPECTION<2.0L DOHCEngine>...........Air Conditioner Power Relay..............................................
Arr Conditioner Swatch........................................................
Components Location
.........................................................
Control
Relay.......................................................................
EGR Control Solenoid Valve...............................................
EGR Temperature Sensor
...................................................
Engine Coolant Temperature Sensor
.................................Fuel Pressure Control Valve...............................................
Idle Position Switch
............................................................
Idle
SpeedControlServo...................................................Injectors
................................................................................
Intake Air Temperature Sensor..........................................
Malfunction Indicator Light.................................................
Oxygen Sensor
....................................................................
Power
Steering
OilPressureSwitch.................................Power Transistor
.................................................................
Purge Control Solenoid Valve.............................................
Self-Diaanosis.......................................................................
58
63
2382
79
688182
79
7682
77
79
79
76
727879
82
8273ThrottletiPosition Sensor
.....................................................77Vehicle Speed Sensor
.........................................................79SERVICE ADJUSTMENT PROCEDURES<1.8L Engine>........................................................................41Curb Idle Speed Inspection
................................................41EGR Valve Control Vacuum Check....................................47Fuel Pressure Test
..............................................................44Fuel Pump Operation Check
..............................................44Idle Speed Control and Throttle Position
Sensor Adjustment
..............................................................
41Purge Port Vacuum Check
.................................................47Release of Residual Pressure from
High Pressure Fuel Hose
...................................................
44Throttle
Body(Throttle Valve Area)Cleaning....................43SERVICE ADJUSTMENT PROCEDURES<2.0LDOHCEngine>............................................................48Basic Idle Speed Adjustment
.............................................
48
Curb Idle Speed Inspection
................................................48EGR Valve Control Vacuum Check....................................55Fuel Pressure Test
..............................................................52Fuel Pump Operation Check
..............................................51Idle Position Switch Adjustment........................................52Purge Port Vacuum Check
.................................................55Release of Residual Pressure from
High Pressure Fuel Hose
...................................................51Throttle Body (Throttle Valve Area) Cleaning....................51ThrottlePositionSensorAdjustment.................................50SPECIALTOOLS......................................................................6SPECIFICATIONS.....................................................................2GeneralSpecifications.........................................................2Sealant and Adhesive
.........................................................5Service Specifications
..........................................................4Torque Specifications
..........................................................5THROlTLEBODY<1.8LEngine>........................................85THROlTLE BODY <2.0L DOHC Engine>............................89TROUBLESHOOTING...............................................................6

14-2FUEL SYSTEM - Specifications
FUEL SYSTEM
SPECIFICATIONS
GENERAL SPECIFICATIONSNW%-
4.8L Engine>
Items
Fuel
Tank capacity
Return system
Filter
Fuel pump
Type
Driven by
Throttle bodyThrottle
bore
Throttle position sensor
Idle speed control servo
Idle position switchMotor position
sensor
Engine control unitIdentification
model No.
For Federal and Canada
For California
SensorsAir flow
sensor
Barometric pressure sensor
Intake air temperature sensor
Engine coolant temperature sensorOxygen
sensor
Vehicle speed sensorInhibitor switch
No. 1 cylinder top dead center sensor
Crank angle sensor
EGR temperature sensor Actuators
Control relay type
Injector type and number
Injector identification mark
Purge control solenoid valve
EGR control solenoid valve
Fuel pressure regulator
Regulated pressure
Specificationsliter
(gal.) 60 (15.9)
Equipped
High pressure type
Electrical, in-tank type
Electric motor
mm (in.) 50 (1.97)
Variable resistor type
Electric motor
Contact type, within idle speed control servo
Variable resistor type
E2T33674
E2T33673
Karman vortex type
Semiconductor diffusion typeThermistor typeThermistor type
Zirconia type
Reed switch type
Contact switch type
Photo interrupter type
Photo interrupter typeThermistor type
Contact switch type
Electromagnetic, 4
N210H
ON/OFF type solenoid valveDuty
cycle type solenoid valve
kPa (psi) 335 (47.6)