22. Increased fuel consumption
1. Clogged air filter (Chapter 1).
2. Ignition timing incorrectly set (chapters 1 and 5).
3. Faulty emission control system (chapter 6).
4. Faulty fuel injection system (chapter 4).
5. Low tire pressure or incorrect tire size (Chapter 1).
23. Gasoline leak or smell
1. Leaking fuel supply or return line (chapters 1 and 4).
2. Fuel tank full.
3. Charcoal filter clogged (chapters 1 and 6).
4. Faulty fuel injectors (chapter 4).