1991 MITSUBISHI ECLIPSE service

1 I-26INTAKE AND EXHAUST -Exhaust Manifold c 1.8L Engine>
EXHAUST MANIFOLD
< 1.8L Engine>
REMOVAL AND INSTALLATION
20-24 ft.lbs.
05A0135Removal steps’
1. Engine oil level gauge guide
2. O-ring3. Self locking nut4. Gasket5. Oxygen sensor6. Exhaust manifold cover (A)
7. Engine hanger8. Exhaust manifold9. Exhaust manifold gasket10. Exhaust manifold cover (B)
NOTE(1) Reverse the removal procedures to reinstall.(2) 4, : Refer to “Service Points of Removal”.(3) q : Non-reusable parts
SERVICE POINTS OF REMOVALNHNBAG5. REMOVAL OF OXYGEN SENSOR
Disconnect the connector of the oxygen sensor, and install
the special tool to the oxygen sensor.
Then, using an offset (box-end) wrench, remove the oxygen
sensor.
INSPECTIONNllNCALO
Check the following points; replace the part if a problem is
found.-y=.EXHAUST MANIFOLD
Check for damage or cracking of any part.EXHAUST MANIFOLD GASKET
Check for flaking or damage of the gasket.
O-ring
3EN239
or blockage.
5. Clean the inlet section of the compressor cover with a rag.
Inspect it for signs of contact with the compressor turbine.
If worn, replace it.WASTE GATE ACTUATOR
1.Leak-test the waste gate valve actuator with a hand vacuum
pump.
Replace the actuator if it does not hold vacuum.
2. Check the rod to see that it is not bent or binding.
SERVICE POINTS OF REASSEMBLYNllLHAB
7. INSTALLATION OF O-RING
Coat the inner surface of a new O-ring with a thin film of
engine oil, and set it in the groove of the cartridge assembly.
Caution+%
Be careful not to damage the O-ring while installing it as__
oil leakage could result.

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.

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

FUEL SYSTEM- Specifications
ItemsSpecifications
Fuel pressure regulator
Regulated pressurekPa (psi) 335 (47.6)
255 (36.3)
300 (42.7)
SERVICE SPECIFICATIONS
<1.8L Engine>N14CB-
ItemsSpecifications
Basic ignition timing~
Curb idle speedvm
, Idle speed when air conditioner is onrpm
Basic idle speedwm
Throttle position sensor adjusting voltageV
Throttle position sensor resistancekQMotor position
sensor resistancek&
Idle speed control servo motor coil resistance
Intake air temperature sensor resistancekQ
Engine coolant temperature sensor resistance
20°C (68°F)
80°C (176°F)
Fuel pressurekPa (psi)
Vacuum hose disconnection
Vacuum hose connection
Iniectnr coil resistance Q
52
k8
5”BTDC at curb idle
700f 100
850 at neutral position
650 at D range
700 f 50
0.48-0.52 at curb idle
3.5-6.5
4-6
5-35 [at 20°C (68”F)l
2.7 [at 20°C (68”F)I
2.5
0.3
330-350 (47-50) at curb idleApprox.
270 (38) at curb idle
13-16 [at 20°C (68”F)l
<2.0L DOHC Engine>
Items( Specifications
Basic ignition timing
Curb idle speedrpm
Idle speed when air conditioner is onrpm

al-r>
Basic idle speedrpm
Throttle position sensor adjustment voltageVThrottle position
sensor resistancekQ
Idle speed control servo (stepper motor) coil resistance
Intake air temperature sensor resistancekQ
Engine coolant temperature sensor resistancek0
20°C (68°F)
80°C (176°F)
Fuel pressurekPa (psi)
Vacuum hose disconnection


Vacuum hose connection

Q
5”+ 2”BTDC at curb idle
750+ 100
850 at neutral position
650 at D range
750 f 50
0.48-0.52 at curb idle
3.5-6.5
28-33 [at 20°C (68”F)l
2.7 [at 20°C (68”F)I
2.5
0.3
330-350 (47-50) at curb idle
250-270 (36-38) at curb idle
290-320 (41-46) at curb idleApprox.
270 (38) at curb idle
Approx. 190 (27) at curb idle
Approx. 230 (33) at curb idle

FUEL SYSTEM - Service Adjustment Procedures <1.8L Engine>l-4-41
SERVICE ADJUSTMENT PROCEDURES

CURB IDLE SPEED INSPECTION
CautionNlIFiiAE
The improper setting (throttle valve opening) will increase
exhaust gas temperature at deceleration, reducing catalystlife greatly and deteriorating exhaust gas cleaning per-
formance. It also has effect on fuel consumption and
engine braking.
ilter
Paper clip
16A0898
PI-e-conditions for inspection
0Engine coolant temperature: 85-95°C (185-205°F)
0Lights, electric cooling fan and accessories: OFF
l Transaxle: Neutral
(P for vehicles with an automatic
transaxle)l Steering wheel: Neutral position (vehicles with a power
steering)l Check ignition timing and adjust if necessary. Refer to
GROUP 8.
NOTEWith vehicles for Canada, the headlights and taillights, etc.
remain on even when the lighting switch is turned OFF, but thiscauses no problems during inspection.
(1) Insert the paper clip to the connector.
(2) Connect the tachometer to the inserted clip.
(3)Run the engine for more than 5 seconds at an engine speedof 2,000 to 3,000 rpm.
(4) Run the engine at idle for 2 minutes.
(5) Read the idling rpm. If it is not within the specified speed,
check the idle speed control system.
Curb idle speed: 700
f 100 rpm
NOTEAdjustment of the idling speed is usually unnecessary,
because this system controls the idling speed.
IDLE SPEED CONTROL AND
THROTlLE POSI-
TION SENSOR ADJUSTMENT
N14FIATAdjustment conditions
l Engine coolant temperature:
85-95X (185-205°F)
l Lights, electric cooling fan and accessories: Set to OFF
l Transaxle: Neutral (P for vehicles with an automatic
transaxle)l Steering wheel: Neutral position (vehicles with a power
steering)
(1) Slacken the accelerator cable enough.
(2) Connect a tachometer.