Mercury 225 EFI Service Manual page 230

Table of Contents
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Management System
Vapor Separator Components
Electronic Fuel Injection (EFl) System
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Test Procedures
EFI System Tests . . . . . . . . . . . . . . . . . . . . .
Safety Precautions . . . . . . . . . . . . . . . . . . .
Fuel Injection System Function
Preliminary Checks . . . . . . . . . . . . . . . . . . . . . .
Ignition Spark Check . . . . . . . . . . . . . . . . . .
Electronic Fuel Injection Set Up
Fresh Quality Fuel . . . . . . . . . . . . . . . . . . . .
Low Battery Voltage . . . . . . . . . . . . . . . . . .
Fuel Flow Diagram . . . . . . . . . . . . . . . . . . . . . .
Fuel Flow Component Description
EFI Electrical Components
EFI Fuel Management
(Low Pressure Fuel Route)
EFI Fuel Management
(High Pressure Fuel Route)
Fuel Rail Electrical/Fuel Determination
EFI System Test Procedures
Fuel Gauge Connection/Pressure Test
Vapor Separator Fuel Delivery Test
Pulse Fuel Pump Delivery Test
Water Separating Filter Inspection
Vapor Separator Float Test
Electric Fuel Pump Inlet Filter Check and
De-Pressurizing EFI System Procedures
Pressure Regulator Test
Electric Fuel Pump Voltage/Pressure Test 3B-30
Injector Electrical Harness Test
Injector Load Test . . . . . . . . . . . . . . . . . . . .
Fuel Rail Assembly Leakage Test
Air Temperature Sensor and Head
Temperature Sensor Test
90-884294 OCTOBER 2001
FUEL SYSTEM
Section 3B - Fuel Injection
3B-2
3B-3
3B-5
. . . . . . . . . . . . . . . . 3B-6
. . . . . . . . . . . . . 3B-10
. . . . . . 3B-12
3B-12
. . . . . . . . . . . . . 3B-12
3B-12
3B-12
. . . . . . . . . 3B-13
3B-13
3B-13
. . . . . . . . 3B-14
3B-14
3B-14
3B-15
. . . . . . . . . 3B-16
. . . . . . . . . . . . 3B-17
. . . . . . . . . . . . . . . 3B-19
. . . . . . . . . . . . . . . 3B-20
. . . . . 3B-21
. . . . . . . . . . . . . . 3B-22
. . 3B-22
. . . . . 3B-23
. . . . . . . . . 3B-24
. . . . . . 3B-25
. . . . . . . . . . . . 3B-26
3B-27
. . . . . . . . . . . . . . . 3B-29
. . . . . . . . . 3B-31
3B-32
. . . . . . . 3B-32
. . . . . . . . . . . . . . 3B-33
Detonation Control System Test
(200 Work Models Only)
Throttle Position Sensor Test
MAP Sensor Test . . . . . . . . . . . . . . . . . . . . .
Problem Diagnosis . . . . . . . . . . . . . . . . . . .
Engine Head Temperature Sensor Removal
Engine Head Temperature
Sensor Installation . . . . . . . . . . . . . . . . . . . . . . .
Fuel Management Assembly Removal
Fuel Rail Removal . . . . . . . . . . . . . . . . . . . .
Fuel Rail Installation . . . . . . . . . . . . . . . . . .
Reed Block Assembly Removal
Reed Block Assembly Installation
Air Temperature Sensor Removal
Air Temperature Sensor Installation
Manifold Absolute Pressure (MAP)
Sensor Removal . . . . . . . . . . . . . . . . . . . . .
Manifold Absolute Pressure (MAP)
Sensor Installation . . . . . . . . . . . . . . . . . . . .
Throttle Plate Assembly Removal
Throttle Plate Assembly Installation
Vapor Separator Disassembly
Vapor Separator Reassembly
Air Plenum Installation
Vapor Separator (VST) Installation
Water Separating Filter Assembly
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Separating Filter Assembly
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Position Sensor Removal
Throttle Position Sensor Installation
Oil Reservoir Removal
Oil Reservoir Installation
Fuel Pressure Regulator Removal
Fuel Pressure Regulator Disassembly
Fuel Pressure Regulator Reassembly
EFI System Cleaning and Inspection
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL INJECTION
. . . . . . . . . . . . . . . 3B-34
. . . . . . . . . . . 3B-35
3B-36
3B-37
3B-40
3B-40
. . . . . 3B-41
3B-45
3B-47
. . . . . . . . 3B-49
. . . . . . . 3B-49
. . . . . . 3B-50
. . . . . 3B-50
3B-50
3B-50
. . . . . . . 3B-51
. . . . . 3B-51
. . . . . . . . . . 3B-51
. . . . . . . . . . 3B-53
. . . . . . . . . . . . . . . . 3B-54
. . . . . . 3B-55
3B-56
3B-56
. . . . . . 3B-57
. . . . . 3B-57
. . . . . . . . . . . . . . . . 3B-58
. . . . . . . . . . . . . . 3B-58
. . . . . . 3B-59
. . 3B-60
. . . 3B-60
. . . . . . . 3B-61
3B-61
3B-61
Page 3B-1
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