Mitsubishi Colt Ralliart. Manual - part 103

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-366

MEASUREMENT OF RESISTANCE 
BETWEEN TERMINALS

1. Disconnect the oil feeder control valve connector.
2. Measure the resistance between the terminals of 

the connector at the oil feeder control valve.

Standard value: 6.9 

− 7.9 Ω (at 20°C)

3. If resistance is outside the standard value, replace 

the oil feeder control valve.

THROTTLE VALVE CONTROL SERVO 
CHECK

M1131051000326

OPERATION CHECK

1. Remove the air intake hose from the throttle body.
2. Turn the ignition switch to ON position.
3. Operate the accelerator pedal and confirm that 

the throttle valve is opening and closing 
accordingly.

CHECK THE COIL RESISTANCE

1. Disconnect the electronic-controlled throttle valve 

connector.

2. Measure the resistance between terminals No. 1 

and No. 2 at the electronic-controlled throttle 
valve connector.

Standard value: 0.3 

− 100 Ω (at 20°C)

3. If the resistance is outside the standard value, 

replace the throttle body assembly.

AK402206

6

1 2 3 4 5

AC

Throttle valve
control servo

Throttle valve control
servo side connector

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INJECTOR

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-367

INJECTOR

REMOVAL AND INSTALLATION

M1131007101620

CAUTION

When the fuel injector replacement is performed, use the M.U.T.-III to initialize the learning value 
(Refer to GROUP 00, Precautions Before Service 

− Initialization Procedure for Learning Value in MPI 

Engine 

P.00-20

).

Pre-removal Operation
• Fuel Discharge Prevention (Refer to 

P.13A-357

).

• Engine Cover Removal (Refer to GROUP 11A, Camshaft 

P.11A-17

).

Post-installation Operation
• Fuel Leakage Inspection
• Engine Cover Installation (Refer to GROUP 11A, Cam-

shaft 

P.11A-17

).

AC312110

11

6

1

2

4

3

5

7

8

9

10

12

13

18 ± 1 N·m

4

N

N

AC

Apply engine oil to
the O-ring before
installation.

N

Removal steps 

1.

PCV hose connection

2.

Ignition coil connector

3.

Fuel injector connector

4.

Control harness clamp connection

<<

A

>> >>

E

<< 5.

Fuel high-pressure hose 
connection

>>

D

<< 6.

Fuel delivery pipe and fuel injector 
assembly

7.

Fuel injector insulator

>>

C

<< 8.

Fuel injector support

>>

B

<< 9.

Fuel injector assembly

>>

A

<< 10. O-ring

>>

A

<< 11. O-ring

12. Fuel injector
13. Fuel delivery pipe

Removal steps (Continued)

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INJECTOR

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-368

REMOVAL SERVICE POINT
<<A>> FUEL HIGH-PRESSURE HOSE 
DISCONNECTION

1. Remove the stopper.

2. Raise the retainer, and pull out the fuel 

high-pressure hose.
NOTE: If the retainer comes off, install it securely 
after pulling out the fuel high-pressure hose.

INSTALLATION SERVICE POINTS
>>A<< O-RING INSTALLATION

1. Apply a small amount of new engine oil to the 

O-ring.

2. While turning the fuel injector to the right and left, 

install the O-ring to the fuel injector with care not 
to damage the O-ring.

>>B<< FUEL INJECTOR ASSEMBLY 
INSTALLATION

CAUTION

Do not let the engine oil get into the fuel delivery 
pipe will be damaged.
1. Apply a drop of new engine oil to the O-ring.
2. Turn the fuel injector assembly to the right and left 

to install to the fuel delivery pipe. Be careful not to 
damage the O-ring. After installing, check that the 
item turns smoothly.

3. If it does not turn smoothly, the O-ring may be 

trapped, remove the fuel injector assembly, 
re-install it into the fuel delivery pipe and check 
again.

4. Install the fuel injector assembly so that the 

convex portion of the fuel injector is located at the 
centre of the fuel delivery pipe brim.

>>C<< FUEL INJECTOR SUPPORT 
INSTALLATION

Install the fuel injector support to the fuel injector 
groove and fuel delivery pipe brim, and fix the fuel 
injector assembly and fuel delivery pipe.

AC403077AB

Fuel high-pressure
hose

Stopper

AC403078 AB

Fuel high-pressure
hose

Retainer

AC312107

AB

(Engine oil)

O-ring

Fuel injector

O-ring

AC312108

AC

Fuel delivery
pipe brim

Fuel injector
protrusion

AC312109

AC

Fuel delivery
pipe brim

Fuel injector
support

Fuel injector
groove

Main

Index

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TOC

INJECTOR

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-369

>>D<< FUEL DELIVERY PIPE AND FUEL 
INJECTOR ASSEMBLY INSTALLATION

CAUTION

Do not let the engine oil get into the engine will 
be damaged.
1. Apply a small amount of new engine oil to the 

O-ring at the tip of the fuel injector assembly.

CAUTION

When installing the fuel delivery pipe and fuel 
injector assembly to the cylinder head, take care 
not to damage the O-ring at the tip of the fuel 
injector assembly.
2. Install the fuel delivery pipe and fuel injector 

assembly to the cylinder head. Be careful not to 
damage the O-ring.

3. Tighten the new fuel delivery pipe mounting bolts 

to the specified torque.

Tightening torque: 18 

± 1 N⋅m

>>E<< FUEL HIGH-PRESSURE HOSE 
CONNECTION

CAUTION

• After connecting the fuel high-pressure hose, 

check that it has been securely installed by 
slightly pulling in the removal direction. At 
this time, also check that there is approxi-
mately 3-mm play.

• Do not let the engine oil get into the fuel deliv-

ery pipe will be damaged.

Apply a small amount of new engine oil to the fuel 
delivery pipe, and install the fuel high-pressure hose 
to the fuel delivery pipe.

AC208465AE

3 mm

Fuel high-pressure hose

Fuel delivery pipe

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