Isuzu Trooper (1998-2002 year). Manual - part 642

6E–216

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

2. Install the fuel return adapter.

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3. Install the rear side engine hanger. Tighten the rear

side engine hanger fixing bolts to specified torque.

Torque: 19 N·m (14 lb ft)

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4. Install the cylinder head. Refer to engine mechanical

section.

5. Install the intercooler assembly.
6. Connect the negative battery cable.

Rail Pressure (RP) Sensor

Removal Procedure

1. Disconnect the negative battery cable.
2. Remove the air cleaner cover and air duct.
3. Remove the intercooler assembly.
4. Remove the injector oil pipe.
5. Remove the intake throttle valve.
6. Remove the cylinder head cover noise inselation.
7. Remove the cylinder head cover.
8. Remove the RP sensor.

Installation Procedure

D

Refer to the 

RP Sensor Programming.

1. Install the RP sensor.
2. Install the cylinder head cover.
3. Install the cylinder head cover noise inselation.
4. Install the intake throttle valve.
5. Install the injector oil pipe.
6. Install the intercooler assembly and tighten

intercooler assembly fixing bolts to specified torque.

Torque: 20 N·m (14 lb ft)

7. Install the air cleaner cover and air duct.
8. Connect the negative battery cable.

Fuel Tank

Removal Procedure

Refer to

Engine Fuel in 4JX1 Engine section.

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6E–217

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

Throttle Body (TB)

Removal Procedure

1. Disconnect the negative battery cable.
2. Remove the cover of the intercooler.

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3. Remove the bolts and the left side bracket to the

intercooler.

4. Remove the air duct with bracket from the intercooler.

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5. Remove the throttle body assembly from the intake

manifold.

6. Disconnect the ITP sensor electrical connector.

Installation Procedure

NOTE: Do not use solvent of any type when you clean the
gasket surfaces on the intake manifold and the throttle
body assembly. The gasket surfaces and the throttle body
assembly may be damaged as a result.

D

If the throttle body gasket needs to be replaced,
remove any gasket material that may be stuck to the
mating surfaces of the manifold.

D

Do not leave any scratches in the aluminum casting.

1. Install the throttle body assembly to the intake

manifold and the air duct with bracket between
throttle body and intercooler.

Torque: 20 N·m (14 Ib ft)

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2. Connect the ITP sensor electrical connector and

throttle motor control connector.

3. Install the bracket to the intercooler.
4. Install the cover of intercooler.
5. Connect the negative battery cable.

Air Conditioning (A/C) Relay

Removal Procedure

1. Remove the fuse and relay box cover from under the

hood.

2. Consult the diagram on the cover to determine which

is the correct relay.

3. Pull the relay straight up and out of the fuse and relay

box.

Installation Procedure

1. Insert the relay into the correct place in the fuse and

relay box with the catch slot facing forward.

2. Press down until the catch engages.

D

An audible “click” will be heard.

3. Install the fuse and relay box cover.

Exhaust Gas Recirculation

(EGR) Vacuum Switch Valve

(VSV)

Removal Procedure

1. Disconnect the negative battery cable.

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4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

2. Disconnect the EGR VSV connector and vacuum

hose from the EGR VSV.

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3. Remove the MAP sensor assembly and EGR VSV.

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4. Remove the EGR VSV from the MAP sensor bracket.

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Installation Procedure

1. Install the EGR VSV and tighten nut to specified

torque.

Torque: 8 N·m (69 lb in)

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6E–219

4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS

2. Install the MAP sensor assembly and EGR VSV and

tighten MAP sensor bracket fixing bolts specified
torque.

Torque: 9 N·m (78 lb in)

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3. Connect the EGR VSV connector and vacuum hose

in the EGR VSV.

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4. Connect the negative battery cable.

Electronic Vacuum Regurating

Valve (EVRV)

Removal Procedure

1. Disconnect the negative battery cable.
2. Disconnect the EVRV hose and the EVRV connector.

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3. Remove the EVRV.

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