Mercury 225 EFI - Fuel System

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