Isuzu engine C22NE / 22LE / 20LE. Manual - part 32

ENGINE FUEL  6C-7

Inspection

1. Replace the fuel filter if the fuel leaks from fuel filter body or

if the fuel filter body itself is damaged.

2. Replace the filter if it is clogged with dirt or sediment.

3. Check the drain and if it is clogged with dust, clean it out

with air.

Installation

1. Install the fuel filter in the proper direction.

2. Install fuel filter holder fixing bolt.

3. Connect fuel hoses on engine side and fuel tank side.

4. Install fuel filler cap

5. Connect the battery ground cable.

Inspection

After installation, start engine and check for fuel leak age.

In-Tank Fuel Filter

The filter is located on the lower end of the fuel pickup tube in
the fuel tank. It prevents dirt from entering the fuel pipe and
also stops water unless the filter is completely submerged in
the water. It is a self cleaning type, not requiring scheduled
maintenance. Excess water and sediment in the tank restricts
fuel supply to the engine, resulting in engine stop. In such a
case, the tank must be cleaned throughly.

6C-8  ENGINE FUEL

Fuel Pump

Fuel Pump and Associated Parts

Legend
1 Fuel Pump and Sender Assembly
2 Fuel Tank Assembly

2

1

Removal

CAUTION: When repair to the fuel system has been
completed, start engine and check the fuel system for
loose connection or leakage. For the fuel system
diagnosis, see Section "Driceability and Emission".
1. Disconnect battery ground cable.

2. Loosen fuel filler cap.

3. Support underneath of the fuel tank assembly (2) with a

lifter.

4. Remove fuel tank assembly (2). Refer to "Fuel Tank

Removal" in this section.

5. Remove fuel pump and sender (FPAS) assembly (1) fixing

snapring and remove the FPAS assembly.

ENGINE FUEL  6C-9

NOTE:

•

After removing pump assembly (1), cover fuel tank to

prevent any dust entering.

•

Remove the fuel pump lock.

Installation

1. Install FPAS assembly (1).

2. Install fuel tank assembly (2). Refer to "Fuel Tank

Installation".

3. Fill the tank with fuel and tighten fuel filler cap.

4. Connect battery ground cable.

Fuel Pump Relay

General Description

In order to control the FPAS operation, the FPAS relay is
provided. When the starter switch is turned to "ON" position,
the FPAS relay operates the FPAS for 2 seconds.
When it is turned to "START" position, the Engine Control
Module receives the reference pulse from the Ignition Control
Module and it operates the relay, again causing the FPAS to
feed fuel.

6C-10  ENGINE FUEL

Fuel Tank

Fuel Tank and Associated Parts

Legend

1 Roll Over&Float Valve (If applicable)
2 Hose; Evaporative Fuel (If applicable)
3 Hose; Air Breather
4 Hose; Fuel Filler

5 Fuel Pump and Sender Assembly
6 Fuel Tank Assembly
7 Hose; Fuel Delivery
8 Hose; Fuel Return

4

(1, 2)

3

5

6

7

8

Removal

CAUTION: When repair to the fuel system has been
completed, start engine and check the fuel system for
loose connection or leakage. For the fuel system
diagnosis, see Section "Driveability and Emission".
1. Disconnect battery ground cable.

2. Loosen fuel filler cap.

3. Support underneath of the fuel tank protector with a lifter.

4. Disconnect evaporative fuel hose at the canister.

5. Disconnect fuel delivery hose and fuel return hose near the

fuel filter.

NOTE: Plug both ends of the fuel hoses to prevent fuel
leakage.