2. Remove the fuel filler cap and inspect it carefully for damage or corrosion. The gasket should have a smooth, full seal. If the gasket is damaged or corroded, replace the cap.
3. Inspect the fuel supply and return lines for cracks. Make sure the fuel lines are tightly connected to the ignition system and to the internal fuel filter.
Warning: Before working on fuel system components, the system pressure must be relieved. The pressure relief procedure is described in chapter 4.
4. Since a number of fuel system components - the tank, fuel supply and return lines, for example - are located underneath the vehicle, it is best to check them on a lift. If a lift is not available, lift the vehicle and place it on jack stands.
5. With the vehicle lifted and securely supported, inspect the fuel tank and filler neck for cracks, punctures, or other damage. The joint between the tank and filler neck should be inspected especially carefully. Sometimes a rubber filler neck will leak due to loose fastening or wear of the rubber. Inspect the brackets and fastening elements of the fuel tank to ensure that it is securely attached to the vehicle
Warning: Never, under any circumstances, attempt to repair the fuel tank (except for replacing rubber parts). A soldering iron or any other open flame can easily cause an explosion of residual fuel vapors in the tank.
6. Carefully inspect all rubber hoses and metal pipes coming from the tank. Look for loose fittings, frayed hoses, bent pipes and other damage. Repair or replace damaged sections as necessary (chapter 4).
This publication was borrowed from the website [FORDBOOK.ru]