Service Manual (KLZ1000C) — page 117 of 762

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FUEL SYSTEM (DFI) 3-33
DFI System Troubleshooting Guide

       Symptoms or Possible Causes                            Actions (chapter)
Fuel pressure regulator trouble               Inspect fuel pressure and replace fuel pump (see
                                              chapter 3).
Fuel line clogged                             Inspect and repair (see chapter 3).
Intake air pressure sensor #1 or #2 trouble   Inspect (see chapter 17).
Water temperature sensor trouble              Inspect (see chapter 17).
Intake air temperature senor trouble          Inspect (see chapter 17).
Accelerator position sensor trouble           Inspect (see chapter 17).
Throttle position sensor trouble              Inspect (see chapter 17).
ETV actuator trouble                          Inspect (see chapter 17).
Unstable (rough) idling:
Fuel pressure too low or too high             Inspect (see chapter 3).
Fuel injector trouble                         Inspect (see chapter 17).
Accelerator position sensor trouble           Inspect (see chapter 17).
Throttle position sensor trouble              Inspect (see chapter 17).
ETV actuator trouble                          Inspect (see chapter 17).
Intake air pressure sensor #1 or #2 trouble   Inspect (see chapter 17).
Water temperature sensor trouble              Inspect (see chapter 17).
Intake air temperature senor trouble          Inspect (see chapter 17).
Engine stalls easily:
Spark plug dirty, broken or gap maladjusted   Inspect and replace (see chapter 2).
Stick coil trouble                            Inspect (see chapter 16).
Accelerator position sensor trouble           Inspect (see chapter 17).
Throttle position sensor trouble              Inspect (see chapter 17).
ETV actuator trouble                          Inspect (see chapter 17).
Intake air pressure sensor #1 or #2 trouble   Inspect (see chapter 17).
Water temperature sensor trouble              Inspect (see chapter 17).
Intake air temperature senor trouble          Inspect (see chapter 17).
Fuel pump trouble                             Inspect (see chapter 3).
Fuel injector trouble                         Inspect (see chapter 17).
Fuel pressure too low or too high             Inspect (see chapter 3).
Fuel pressure regulator trouble               Inspect fuel pressure and replace fuel pump (see
                                              chapter 3).
Fuel line clogged                             Inspect and repair (see chapter 3).
Poor acceleration:
Fuel pressure too low                         Inspect (see chapter 3).
Water or foreign matter in fuel               Change fuel. Inspect and clean fuel system (see
                                              chapter 3).
Fuel filter clogged                           Replace fuel filter (see chapter 2).
Fuel pump trouble                             Inspect (see chapter 3).
Fuel injector trouble                         Inspect (see chapter 17).
Accelerator position sensor trouble           Inspect (see chapter 17).
Throttle position sensor trouble              Inspect (see chapter 17).
ETV actuator trouble                          Inspect (see chapter 17).
Intake air pressure sensor #1 or #2 trouble   Inspect (see chapter 17).
Water temperature sensor trouble              Inspect (see chapter 17).