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.
Do not attempt to repair the fuel tank yourself under any circumstances (except for replacing its rubber components) - contact of residual fuel vapors contained even in a thoroughly ventilated tank with a gas burner or any other source of open flame can cause them to detonate!
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 Power and exhaust systems).
6. Another source of gasoline odor may be components of the evaporative emission (EVAP) system (see Section Checking the condition of the fuel evaporative emission system components).
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