2007 ISUZU KB P190 Fuel line

Fuel System – V6 Page 6C – 13

4 Service Operations
4.1 Fuel Lines And Quick Connect Fittings
Description
The fuel line connector fittings contain the following
components:
1 O-rings
2 Fuel line port
3 Connector
4 Plastic fuel line tube

Figure 6C – 8

Leak Test and Inspection
1. Turn the ignition key to the ON position and ensure the fuel pump runs for a short time by listening for the pump start up sound. The fuel pressure will increase when the fuel pump is actuated.
2 Perform a preliminary check of the system by inspecting the system for any leaks around the connections and fittings.
3 Perform steps 1 and 2 several times.
4 If the preliminary check of the system produces no leaks, start the engine and check the system again for any sign of leaks around the connections and lines.

Ensure all service precautions have been
observed prior to removing any connector
fittings.


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ISUZU KB P190 2007

Fuel System – V6 Page 6C – 14

Removal
1 Depressurize the fuel system, refer to 3.4 Fuel
System Depressurisation.
2 Use compressed air to remove any dirt around the fuel line quick connect fittings prior to disconnecting the
fittings.
Figure 6C – 9
3 Hold the connector in one hand and depress the square release buttons on the connector body while
gently pulling the quick connector and the fuel line
apart with the other hand.
Figure 6C – 10
4 Cover the quick connect fittings to prevent dirt or other foreign material from entering the system.


NOTE
• Check the fuel lines and connector fittings for
any scratches, rust, dents, or cracks.
Replace the connector or the fuel line if found
to be defective.
• Inspect the O-rings in the quick connectors
and replace the connector if found to be
defective.
Figure 6C – 11

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Fuel System – V6 Page 6C – 15

Reinstall
1 Apply a small amount of engine oil or light oil to the
fuel line to assist in the assembly of the connector.


NOTE
Assembly of the fuel line and quick connectors
should take place immediately after applying the
oil to prevent any dust from sticking to the
surface, which may cause the connector to leak.
Figure 6C – 12
4.2 Fuel Filter
Removal
1 Depressurize the fuel system, refer to 3.4 Fuel
System Depressurisation.
2 Disconnect the battery ground cable.

A small amount of fuel will flow out of the
fuel lines and filter when disconnected.
3 Locate the fuel filter attached to the front of the fuel tank, place a drain tray below the fuel filter and
remove the fuel line quick connectors from the inlet
(2) and the outlet (1) of the fuel filter, refer to 4.1 Fuel
Lines And Quick Connect Fittings.
Figure 6C – 13

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Fuel System – V6 Page 6C – 16

4 Release the 3 clips (1) on the passenger side of the
fuel filter holder and slide the fuel filter from the holder
in the direction of the arrow.

NOTE
Cover the quick connectors to prevent any dirt
from entering the fuel system.
Figure 6C – 14
Inspection
1 Replace the fuel filter if fuel leaks from the filter body or if the fuel filter body itself is damaged.
2 Replace the fuel filter if it is clogged with dirt or sediment or the filter shows signs of being contaminated with water or other foreign materials.
Reinstallation
1 Slide the fuel filter into the holder attached to the front of the fuel tank, make sure the three plastic locking
clips secure the filter in place.
NOTE
• Ensure the fuel filter inlet line is facing the
drivers side if the vehicle and the outlet line is
facing the passengers side of the vehicle.
• The direction arrow indicates the direction of
fuel flow.
2 Connect the inlet and outlet fuel line quick connectors to the fuel filter, refer to 4.1 Fuel Lines And Quick
Connect Fittings.
Figure 6C – 15


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Fuel System – V6 Page 6C – 17

4.3 Fuel Tank and Pump Assembly

Figure 6C – 16
Legend
1 Fuel Feed Line
2 Fuel Return Line
3 Fuel Emission Line
4 Fuel Pump and Sender Assembly
5 Connector; Fuel Pump and Sender
6 Fuel Lines
7 Retainer Ring (Fuel Pump Lock)
8 O-Ring
9 Fuel Tank Assembly
10 Evaporative Line



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Fuel System – V6 Page 6C – 18

4.4 Fuel Tank Assembly

Figure 6C – 17
Legend
1 Front Fuel Tank Strap Bolt
2 Front Fuel Tank Strap
3 Rear Side Shield
4 Fuel Tank
5 Evaporative Line
6 Fuel Filler Hose 7 Rear Under Shield Plastic Strap
8 Rear Fuel Tank Strap Bolt
9 Rear Fuel Tank Strap
10 Under Shield
11 Front Under Shield Plastic Strap
12 Evaporative Line and Quick Connector 13 Fuel Lines and Quick Connector
14 Main Fuel Supply Line
15 Fuel Filter
16 Side Shield
17 Retainer


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ISUZU KB P190 2007

Fuel System – V6 Page 6C – 19

Remove

• A depressurised fuel system contains fuel
in the fuel filter and fuel lines that can be
spilled during service operations.
• Fuel vapour remains in the fuel tank even
when completely empty. Seal all openings
in the fuel tank using suitable material or a
plastic plug. Ensure no naked flames or
other ignition sources are nearby. Ensure
all cellular phones (and transmission
devices that may cause any metal objects
to become unintentional receiving
antennas) are switched off.
• Place a dry chemical (Class B) fire
extinguisher nearby before performing any
on-vehicle service procedures. Failure to
follow these precautions may result in
personal injury.
1 Remove the fuel pump relay, refer to 8A Electrical Body and Chassis.
2 Depressurise the fuel system, refer to 3.4 Fuel System Depressurisation.

Never drain or store fuel into an open
container, due to the possibility of fire or
explosion.
3 Siphon the fuel tank, using commercially-available equipment.

Before proceeding, clean all traces of dirt and
other foreign material from the top of the fuel
tank, near the modular fuel pump and sender
assembly.
7 Place a drain tray under the fuel filter area.

Fuel can spill from the disconnected filter.

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Fuel System – V6 Page 6C – 20

8 From behind the fuel filler door (1), unscrew the fuel
filler cap (4) and cover the end of the fuel filler neck
with a suitable material to prevent foreign objects from
entering the fuel tank.
9 Remove the screw (2) securing the fuel filler neck (3) to the fuel filler pocket.
10 Remove the front half of the right-hand rear wheelhouse liner, refer to 10 Cab.

Fuel filler neck attaching screw
torque specification ..............................................5.0 Nm
Figure 6C – 18
11 Unclip the fuel filler door release cable (1) from the retainer on the fuel filler neck (2).
Figure 6C – 19
12 Lower the fuel filler neck and breather hose assembly.
13 Loosen the clamp (2) and disconnect the fuel tank breather hose (3) from the fuel filler neck (1).
Figure 6C – 20

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ISUZU KB P190 2007