Opel Frontera UE. Manual - part 770

ENGINE FUEL (X22SE 2.2L)

6C–1

ENGINE FUEL (X22SE 2.2L)

CONTENTS

Service Precaution......................................... 6C - 1
General Description ....................................... 6C - 2

Fuel Metering.............................................. 6C - 3

Fuel Filter ...................................................... 6C - 4

Fuel Filter and Associated Parts................. 6C - 4
Removal ..................................................... 6C - 4
Inspection ................................................... 6C - 4
Installation .................................................. 6C - 4
Inspection ................................................... 6C - 5
In–Tank Fuel Filter...................................... 6C - 5
Fuel Pump Flow Test.................................. 6C - 5

Fuel Pump ..................................................... 6C - 6

Fuel Pump and Associated Parts ............... 6C - 6
Removal ..................................................... 6C - 6
Installation .................................................. 6C - 7

Fuel Tube / Quick – Connector Fittings......... 6C - 8

Precautions................................................. 6C - 8

Cautions During Work................................. 6C - 8
Removal...................................................... 6C - 8
Reuse of Quick–Connector......................... 6C - 9
Assembling Advice ..................................... 6C - 9

Fuel Pump Relay........................................... 6C - 10

General Description .................................... 6C - 10

Fuel Tank ...................................................... 6C - 10

Fuel Tank and Associated Parts................. 6C - 10
Removal...................................................... 6C - 11
Installation................................................... 6C - 11

Fuel Gage Unit .............................................. 6C - 11

Removal and Installation ............................ 6C - 11

Fuel Filler Cap ............................................... 6C - 12

General Description .................................... 6C - 12
Inspection ................................................... 6C - 12

Main Data and Specifications ........................ 6C - 13
Special Tool ................................................... 6C - 13

Service Precaution

WARNING:  THIS VEHICLE HAS A SUPPLEMENTAL 
RESTRAINT SYSTEM (SRS).   REFER TO THE SRS 
COMPONENT AND WIRING LOCATION VIEW IN 
ORDER TO DETERMINE WHETHER  YOU ARE 
PERFORMING SERVICE ON OR NEAR THE SRS 
COMPONENTS OR THE SRS WIRING.  WHEN YOU 
ARE PERFORMING SERVICE ON OR NEAR THE 
SRS COMPONENTS OR THE SRS WIRING,  REFER 
TO THE SRS SERVICE INFORMATION. FAILURE TO 
FOLLOW WARNINGS COULD RESULT  IN 
POSSIBLE AIR BAG DEPLOYMENT, PERSONAL 
INJURY, OR OTHERWISE UNNEEDED SRS SYSTEM 
REPAIRS.

CAUTION:  Always use the correct fastener in the 
proper location.  When you replace a fastener, use 
ONLY the exact part number for that application. 
ISUZU will  call out those fasteners that require a 
replacement after removal. ISUZU will also call out 
the  fasteners that require thread lockers or thread 
sealant. UNLESS OTHERWISE SPECIFIED, do  not 
use supplemental coatings (Paints, greases, or 
other corrosion inhibitors) on threaded  fasteners or 
fastener joint interfaces. Generally, such coatings 
adversely affect the fastener  torque and the joint 
clamping force, and may damage the fastener. When 
you install fasteners,  use the correct tightening 
sequence and specifications. Following these 
instructions can help you  avoid damage to parts 
and systems.

SECTION

6C–2

ENGINE FUEL (X22SE 2.2L)

General Description

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(1) Fuel Filter Cap
(2) Fuel Tank
(3) Rollover Valve
(4) Fuel Pump and Sender Assembly
(5) Fuel Filter
(6) Fuel Rail

(7) Intake Manifold
(8) Fuel Pressure Control Valve
(9) Throttle Valve

(10) Canister
(11) Evapo Pipe

ENGINE FUEL (X22SE 2.2L)

6C–3

When working on the fuel system, there are several 
things to keep in mind:

• Any time the fuel system is being worked on, 

disconnect the negative battery cable except for 
those tests where battery voltage is required.

• Always keep a dry chemical (Class B) fire 

extinguisher near the work area.

• Replace all pipes with the same pipe and fittings that 

were removed.

• Clean and inspect “O" rings. Replace if required.

• Always relieve the line pressure before servicing any 

fuel system components.

• Do not attempt repairs on the fuel system until you 

have read the instructions and checked the pictures 
relating to that repair.

• Adhere to all Notices and Cautions.
All gasoline engines are designed to use only unleaded 
gasoline. Unleaded gasoline must be used for proper 
emission control system operation.
Its use will also minimize spark plug fouling and extend 
engine oil life. Using leaded gasoline can damage the 
emission control system and could result in loss of 
emission warranty coverage.
All cars are equipped with an Evaporative Emission 
Control System. The purpose of the system is to 
minimize the escape of fuel vapors to the atmosphere.

Fuel Metering

The Powertrain Control Module (PCM) is in complete 
control of this fuel delivery system during normal driving 
conditions.
The intake manifold function, like that of a diesel, is 
used only to let air into the engine. The fuel is injected 
by separate injectors that are mounted over the intake 
manifold.
The Manifold Absolute Pressure (MAP) sensor 
measures the changes in the intake manifold pressure 
which result from engine load and speed changes, 
which the MAP sensor converts to a voltage output.
This sensor generates the voltage to change 
corresponding to the flow of the air drawn into the 
engine.
The changing voltage is transformed into an electric 
signal and provided to the PCM.
With receipt of the signals sent from the MAP sensor, 
Intake Air Temperature sensor and others, the PCM 
determines an appropriate fuel injection pulse width 
feeding such information to the fuel injector valves to 
effect an appropriate air/fuel ratio.
The Multiport Fuel Injection system utilizes an injection 
system where the injectors turn on at every crankshaft 
revolution.  The PCM controls the injector on time so 
that the correct amount of fuel is metered depending on 
driving conditions.
Two interchangeable “O" rings are used on the injector 
that must be replaced when the injectors are removed.
The fuel rail is attached to the top of the intake manifold 
and supplies fuel to all the injectors.
Fuel is recirculated through the rail continually while the 
engine is running. This removes air and vapors from the 
fuel as well as keeping the fuel cool during hot weather 
operation.
The fuel pressure control valve that is mounted on the 
fuel rail maintains a pressure differential across the 
injectors under all operating conditions. It is 
accomplished by controlling the amount of fuel that is 
recirculated back to the fuel tank based on engine 
demand.
See Section “Driveability and Emission" for more 
information and diagnosis.

6C–4

ENGINE FUEL (X22SE 2.2L)

Fuel Filter

Fuel Filter and Associated Parts

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Removal

CAUTION:  When repair to the fuel system has been 
completed, start engine  and check the fuel system 
for loose connections or leakage. For the fuel 
system diagnosis, see  Section “Driveability and 
Emission".

1. Disconnect battery ground cable.

2. Remove fuel filler cap.

3. Disconnect fuel hoses(1) from fuel filter on both 

engine side and fuel tank side.

4. Fuel filter fixing bolt.

• Remove the fuel filter fixing bolt on fuel filter 

holder(3).

5. Remove fuel filter(2).

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.

(1) Fuel Hose
(2) Fuel Filter

(3) Fuel Filter Holder
(4) Fuel Hose