Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 230

ENGINE COOLING (6VE1 3.5L)

6B–13

Special Tool

ILLUSTRATION

TOOL NO.

TOOL NAME

J–24460–01

Tester; radiator cap

J–33984–A

Adapter; radiator cap

6C–1

ENGINE FUEL (6VE1 3.5L)

AXIOM

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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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

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Removal

6C–6

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Installation

6C–7

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Fuel Tube / Quick – Connector 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–9

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Assembling Advice

6C–9

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Fuel Pump Relay

6C–10

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General Description

6C–10

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Fuel Tank

6C–10

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Fuel Tank and Associated Parts

6C–10

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Removal

6C–11

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Installation

6C–11

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Fuel Gauge Unit

6C–12

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Removal and Installation

6C–12

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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–13

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Special Tool

6C–13

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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 (6VE1 3.5L)

General Description

140R200004

Legend

(1) Fuel Filler Cap
(2) Fuel Tank
(3) Rollover Valve
(4) Fuel Pump and Sender Assembly
(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
(15) Vent Hose
(16) Vent Solenoid Valve
(17) Separator
(18) Shut off Valve (With Over Pressure Relief

Valve)

6C–3

ENGINE FUEL (6VE1 3.5L)

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 battery ground 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.

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.
The vapor pressure sensor and vent solenoid valve for
vapor pressure sensor are used to detect abnormalities in
the evaporative emission control system.
The PCM decides whether there is an abnormality in the
evaporative emission control system based on vapor
pressure sensor signal.

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
affect 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.