Warning! Remember that gasoline is a highly flammable liquid! When servicing fuel system components, observe all fire safety precautions. Do not smoke, do not approach the work area with an open flame or unprotected portable equipment. Do not service the system in a room equipped with heating devices that operate on natural gas and are equipped with a pilot flame (such as water heaters and clothes dryers). Remember that gasoline is a carcinogen that can cause cancer, try to avoid fuel coming into contact with exposed areas of the body, use protective rubber gloves. In case of accidental contact, wash your hands thoroughly with warm water and soap. Collect spilled fuel immediately and do not store fuel-soaked rags near open flames. Remember that the fuel injection system is constantly under pressure. Before disconnecting the fuel lines, release the residual pressure (for more details, see Chapter Fuel and exhaust systems). Wear safety glasses when servicing fuel system components. Always keep a class B fire extinguisher on hand!
1. The easiest way to check the condition of the fuel system components is with the vehicle raised above the ground; use a winch/lift, or drive the vehicle onto an overpass/inspection pit.
2. If the smell of gasoline appears in the car while driving or after a long period of parking in direct sunlight, you should immediately carry out a thorough inspection of all components of the fuel system.
3. Remove the fuel filler cap and inspect it for damage and corrosion. There should be a continuous trace of tight pressure around the entire perimeter of the sealing gasket. If any defects are found, replace the gasket.
4. Check the fuel tank and its filler neck for punctures, cracks and other damage. Pay special attention to inspecting the junction of the neck with the tank. Sometimes the rubber of the neck begins to leak fuel due to loosening of the fastening clamps or as a result of aging of the material. Assess the reliability of the tank fastening. Listed here are only those possible problems, the diagnosis and elimination of the causes of which lies within the qualifications of the average amateur mechanic.
Warning! Do not attempt to repair the fuel tank yourself under any circumstances (except for the replacement of its rubber components) – contact of residual fuel vapors contained even in a carefully ventilated tank with a gas burner torch or any other source of open flame can cause their detonation!
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5. Carefully inspect all rubber hoses and metal tubes of fuel lines coming from the gas tank. Check the condition of the material of the tubes/hoses and the reliability of fastening of all nipple connections. Also check the fuel lines going to the fuel injection system. Make the necessary repairs, replace defective components (see chapter Fuel and exhaust systems).
6. Another source of gasoline odor may be components of the evaporative emission (EVAP) system (see chapter Engine management and emission control systems).