Opel Frontera UBS. Service manual — part 1146
6B–14
ENGINE COOLING
Special Tool
ILLUSTRATION
TOOL NO.
TOOL NAME
5–8840–0277–0
(J–24460–01)
Tester; radiator cap
5–8840–2603–0
(J–33984–A)
Adapter; radiator cap
6C–1
ENGINE FUEL
ENGINE
ENGINE FUEL
CONTENTS
Service Precaution
6C–1
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General Description
6C–2
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Fuel Metering
6C–3
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Fuel Filter
6C–4
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Fuel Filter and Associated Parts
6C–4
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Removal
6C–4
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Inspection
6C–4
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Installation
6C–5
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Inspection
6C–5
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In–Tank Fuel Filter
6C–5
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Fuel Pump Flow Test
6C–5
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Fuel Pump
6C–6
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Fuel Pump and Associated Parts
6C–6
. . . . . . . .
Removal
6C–6
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Installation
6C–6
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Fuel Pump Relay
6C–7
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General Description
6C–7
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Fuel Tank
6C–7
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Fuel Tank and Associated Parts
6C–7
. . . . . . . . .
Removal
6C–7
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Installation
6C–8
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Fuel Tube / Quick – Connect Fittings
6C–8
. . . . . . .
Precautions
6C–8
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Cautions During Work
6C–8
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Removal
6C–8
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Reuse of Quick–Connector
6C–10
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Assembling Advice
6C–10
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Fuel Gauge Unit
6C–11
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Fuel Gauge Unit and Associated Parts
6C–11
. . .
Removal
6C–11
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Installation
6C–11
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Fuel Filler Cap
6C–12
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General Description
6C–12
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Inspection
6C–12
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Main Data and Specifications
6C–12
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Service Precaution
WARNING: IF SO EQUIPPED WITH 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.
6C–2
ENGINE FUEL
General Description
140RW030
Legend
(1) Fuel Filler Cap
(2) Fuel Tank
(3) Rollover Valve
(4) Fuel Pump
(5) Fuel Filter
(6) Fuel Rail Right
(7) Right Bank
(8) Fuel Rail Left
(9) Left Bank
(10) Fuel Pressure Control Valve
(11) Common Chamber
(12) Duty Solenoid Valve
(13) Throttle Valve
(14) Canister
When working on the fuel system, there are several
things to keep in mind:
D
Any time the fuel system is being worked on,
disconnect the negative battery cable except for
those tests where battery voltage is required.
D
Always keep a dry chemical (Class B) fire
extinguisher near the work area.
D
Replace all pipes with the same pipe and fittings that
were removed.
D
Clean and inspect “O” rings. Replace if required.
D
Always relieve the line pressure before servicing any
fuel system components.
D
Do not attempt repairs on the fuel system until you
have read the instructions and checked the pictures
relating to that repair.
6C–3
ENGINE FUEL
D
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 Engine Control Module (ECM) 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 ECM.
With receipt of the signals sent from the MAP sensor,
Intake Air Temperature sensor and others, the ECM
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 ECM 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.
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