3-28 FUEL SYSTEM (EFI)
Symptoms or Possible Causes Actions (chapter)
Drive train trouble Inspect drive chain (see chapter 2) and sprockets
(see chapter 11).
Camshaft cam worn Inspect and replace (see chapter 5).
Air switching valve trouble Inspect and replace (see chapter 5).
Air suction valve trouble Inspect and replace (see chapter 5).
Catalytic converters melt down due to muffler
overheating
Replace muffl er (see chapter 5).
Exhaust Smokes Excessively:
(White smokes)
Piston oil ring worn Inspect and replace (see chapter 5).
Cylinder worn Inspect and replace (see chapter 5).
Valve oil seal damaged Replace (see chapter 5).
Valve guide worn Replace the guide (see chapter 5).
Engine oil level too high Repair (see chapter 7).
(Black smoke)
Air cleaner clogged Clean (see chapter 3).
Too high fuel pressure Clean (see chapter 3).
Injector stuck open Clean (see chapter 3).
Coolant temperature sensor trouble Inspect and replace (see chapter 3).
Inlet air temperature sensor trouble Inspect and replace (see chapter 3).
(Brown smoke)
Air cleaner duct loose Reinstall (see chapter 3).
Air cleaner O-ring damaged Replace (see chapter 3).
Too low fuel pressure Inspect fuel line and fuel pump (see chapter 3).
Water temperature sensor trouble
Inspect and replace (see chapter 3).
Inlet air temperature sensor trouble Inspect and replace (see chapter 3).
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