Section 5B EFI Fuel System Section 5B Electronic Fuel Injection (EFI) Fuel System Contents Page(s) Description Initial Starting/Priming Procedure .................................................................................................................... 5B.2 Fuel Recommendations ........................................................................................................................................ 5B.2 EFI Fuel System Components ..............................................................................................................................
5B.3 Operation................................................................................................................................................................ 5B.3 Important Service Notes ...................................................................................................................................... 5B.4 5B Electrical Components Electronic Control Unit (ECU) .................................................................................................................... 5B.4-5B.5 Engine Speed Sensor.....................................................................................................................................
5B.5-5B.6 Throttle Position Sensor (TPS) & “Auto-Learn” Initialization Procedures ......................................... 5B.6-5B.8 Engine (Coolant) Temperature Sensor....................................................................................................... 5B.8-5B.9 Oxygen Sensor ............................................................................................................................................ 5B.9-5B.11 Electrical Relay .........................................................................................................................................
5B.11-5B.12 Fuel Injectors ............................................................................................................................................. 5B.12-5B.15 Ignition System ......................................................................................................................................... 5B.15-5B.16 Spark Plugs........................................................................................................................................................... 5B.16 Wiring Harness ...................................................................................................................................................
5B.16 Battery Charging System................................................................................................................................... 5B.16 Fuel Components Fuel Pump.................................................................................................................................................. 5B.16-5B.17 Fuel Pressure Regulator .......................................................................................................................... 5B.17-5B.18 Fuel Filter ..............................................................................................................................................................
5B.19 Fuel Rail ................................................................................................................................................................ 5B.19 Fuel Line ................................................................................................................................................................ 5B.19 Throttle Body/Intake Manifold Assembly....................................................................................................... 5B.20 Idle Speed Adjustment (RPM) ...........................................................................................................................
5B.20 Initial Governor Adjustment ................................................................................................................. 5B.20-5B.22 Troubleshooting Electrical System ...................................................................................................................................... 5B.22-5B.25 Fuel System .......................................................................................................................................................... 5B.26 Fault Codes ................................................................................................................................................
5B.26-5B.33 Troubleshooting Flow Chart .................................................................................................................. 5B.33-5B.34 Flow Chart Diagnostic Aids ................................................................................................................... 5B.35-5B.36 Common Complaints/Problems ............................................................................................................ 5B.36-5B.37 5B.1