1998 MITSUBISHI LANCER EVOLUTION IV fuel pressure

MPI – On-vehicle Service13-31
5. MPI SYSTEM COMPONENTS LAYOUT
NameSymbolNameSymbol
A/C switchQExhaust temperature warning lampS
A/C relayHFuel pressure control valveA
Air flow sensor (with a built-in intake air temperaturesensor and barometric pressure sensor)FIgnition coil and power transistor unitLsensor and barometric pressure sensor)InjectorB
Camshaft position sensorMISC servoD
Control relay and fuel pump relayPOxygen sensorK
Coolant temperature sensorEPower steering fluid pressure switchI
Crank angle sensorJSecondary air control solenoid valveN
Detonation sensorCThrottle position sensor (with a built-in idle switch)D
Diagnosis connectorR
Engine ECUOVehicle speed sensorT
Engine warning lampSWastegate solenoid valveG

MPI – On-vehicle Service13-34
9. INJECTOR CHECK
Injection Condition Check
(1) Release the residual pressure from the fuel pipe line to
prevent fuel from flowing out.
(2) Remove the injector.
(3) Set up the special tools (Injector Test Set, Adapter, Fuel
Pressure Regulator, and Clip) as illustrated below.
(4) From here on, use the same procedure as with the
conventional 4G9 engine for the check.
MD998741
MD998706 MB991607Main hose
BatteryInjectorClip: MD998746Return hose
Fuel Pressure Regulator: MD116395
10. RESISTOR CHECK
(1) Disconnect the resistor connector.
(2) Measure resistance across terminals as detailed below.
Standard value
Measurement terminalsResistance (Ω)
1 – 3
4 – 3
5 5 to 6 5 (at 20C)
5 – 3
5.5 to 6.5 (at 20C)
6 – 3
Resistor

MPI – Injector13-36
INJECTOR
REMOVAL AND INSTALLATION
Pre-removal Operation
(1) Fuel Discharge Prevention
(2) Air Hose D Removal
(Refer to GROUP15 – Intercooler.)Post-installation Operation
(1) Air Hose D Installation
(Refer to GROUP15 – Intercooler.)
(2) Fuel Leakage Check
O-ring
9 {0.9}83, 6
11
12
O-ring 10 – 13 {1.0 – 1.3}
Engine oil
1
2 3
4
5
6 78 9
10 11 12
Unit: Nm {kgf
m}
4
Removal steps
1. Injector connector
2. PCV hose connection
A3. High-pressure fuel hose connection
4. Fuel return hose connection
5. Vacuum hose connector
A6. Fuel pressure regulator7. Fuel return pipe
A8. Delivery pipe
9. Insulator
10. Insulator
AA11. Injector
12. Grommet

INTAKE AND EXHAUST – Intake Manifold15-9
INTAKE MANIFOLD
REMOVAL AND INSTALLATION
Pre-removal Operation
(1) Fuel Discharge Prevention
(2) Throttle Body Removal (Refer to GROUP 13.)
(3) Front Exhaust Pipe Removal (Refer to P.15-14.)
(4) Air Control Valve Bracket Removal (Refer to P.15-8.)
(5) Strut Tower Bar RemovalPost-installation Operation
(1) Strut Tower Bar Installation
(2) Air Control Valve Bracket Installation
(Refer to P.15-8.)
(3) Front Exhaust Pipe Installation (Refer to P.15-14.)
(4) Throttle Body Installation (Refer to GROUP 13.)
O-ring
Unit: Nm {kgf
m}
15
Engine oil
3 {0.3} 10 – 13 {1.0 – 1.3}
10 – 12
{1.0 – 1.2}
12 – 15 {1.2 – 1.5}
35 {3.6}
9 {0.9}30 {3.1}35 {3.6}20 {2.0}22 {2.2}20 {2.0}
14 14
167
5
17
1521
3
4 6
7 7
19
20
18 8
9 12
1011
13
Removal steps
1. Center cover
2. Ignition coil connector connection
3. Oxygen sensor connector connec-
tion
4. Crank angle sensor connector con-
nection
5. Injector connector connection
6. PCV hose
7. Vacuum hose connection
8. Brake booster vacuum hose con-
nection
9. Vacuum tank, solenoid valve, and
vacuum hose assembly10. Intake manifold stay
11. Oil level gauge guide assembly
12. Vacuum hose and pipe mounting
bolt
13. Fuel return hose connection
A14. Fuel high pressure hose connection
A15. Delivery pipe, injector, and pres-
sure regulator assembly
16. Insulator
17. Insulator
18. Alternator brace stay
19. Intake manifold
20. Intake manifold gasket

INTAKE AND EXHAUST – Intake Manifold15-10
REMOVAL SERVICE POINT
ADELIVERY PIPE, INJECTOR AND PRESSURE
REGULATOR REMOVAL
Remove the delivery pipe with the injectors and pressure
regulator attached to it.
Caution
Care must be taken, when removing the delivery pipe,
not to drop the injector.
INSTALLATION SERVICE POINT
AHIGH-PRESSURE FUEL HOSE INSTALLATION
(1) When connecting the high-pressure fuel hose to the
delivery pipe, apply a small amount of new engine oil
to the O-ring and then insert the high-pressure fuel hose,
being careful not to damage the O-ring.
Caution
Be careful not to let any engine oil get into the delivery
pipe.
(2) Check to be sure that the high pressure hose turns
smoothly.
If it does not turn smoothly, the O-ring may be trapped.
Remove the high-pressure fuel hose to check for damaged
O-ring and then re-insert it into the delivery pipe and
check once again.
(3) Tighten the mounting bolts to the specification.
INSPECTION
INTAKE MANIFOLD CHECK
(1) Check the intake manifold for damage or cracking and
replace it if defective.
(2) Using a straight edge and feeler gauge, check for distortion
of the cylinder head installation surface.
Standard value: 0.15 mm or less
Limit: 0.2 mm
High-pressure
fuel hoseDelivery pipe
O-ring

ENGINE EMISSION CONTROL –
Engine Control System /
Emission Control System 17-2
ENGINE CONTROL SYSTEM
SERVICE SPECIFICATIONS
ItemsStandard value
Idle speed rpm850 ± 50
EMISSION CONTROL SYSTEM
ON-VEHICLE SERVICE
SYSTEM CONFIGURATION DIAGRAM
Canister
Check
valve
Throttle body
Fuel pressure control
valve
Fuel pressure regulator
PCV valve
AirInjector
High temperature sensor*
*: EVOLUTION-IV only

ENGINE EMISSION CONTROL – Emission Control System 17-3
VACUUM HOSE PIPING CIRCUIT DIAGRAM
Fuel pressure
control valve
Surge tank
Secondary air
control solenoid
valveBlue White
Canister
Check
valve
Throttle body
Fuel
pressure
regulatorWastegate
solenoid
valve
Secondary
air valve
Bypass
valve
Front of vehicle
Wastegate
actuator Vacuum hose color
B: Black
L: Blue
R: Red
W: White
Y: Yellow
CANISTER
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation

Air Cleaner Removal and Installation
2
1
3
4
Removal steps
1. Vapor hose
2. Purge hose
3. Canister
4. Canister bracket

CHASSIS ELECTRICAL – Combination Meters54-23
SEALANT
ItemsSpecified sealantRemark
Engine coolant temperature gauge
unit threaded portion3M Adhesive nut locking No. 4171 or
equivalentDrying sealant
SPECIAL TOOLS
ToolNumberNameUse
A
B
C
D
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222Harness set
A: Test harness
B: LED harness
C: LED harness
adapter
D: ProbeFuel gauge simple check
A: Connector pin contact pressure check
B, C: Power circuit check
D: Commercial tester connection