Warning: Before you begin, read the warning in paragraph 1 this chapter.
1. The fuel system presented in this chapter is defined as a system that consists of a fuel tank and its fuel pump/fuel level sensor, fuel filter, fuel injectors, and pressure regulator installed in the fuel rail, as well as metal pipes and flexible hoses connecting these components. All of them contain fuel, which is under pressure when the engine is running and/or the ignition is on.
2. After the ignition is turned off, the pressure in the system remains for some time. Therefore, it must be eliminated before removing the components.
3. Ford recommends relieving the pressure using tool 29-033, which is installed on the fuel line pressure control/relief fitting. The fitting contains a Schrader valve (with a blue plastic cap) located on the fuel line (see Fig. 2.3), and the tool acts as a tap when pressed on the valve core. On 1997 and later models, you will need to remove the air duct connecting the air cleaner and air flow meter.
4. If you do not have such a device, place a container under the fitting and wrap it with a rag to catch any fuel drips. Do not press on the valve core without wrapping it with a rag, as this may cause splashes and, therefore, the risk of fire or accident due to fuel getting into the eyes.
5. You can also relieve residual pressure by disconnecting the fuel pump power supply with the engine running. To do this, remove the fuel pump fuse (No. 14) and wait until the engine idles and stops due to the lack of fuel pressure. Then turn the engine over with the starter once or twice to make sure that the pressure has been relieved. Then turn off the ignition. When you have finished working, do not forget to replace the fuse.
6. Please note that after releasing the pressure and draining (even partially) the fuel from the system, it will take significantly longer to restart the engine, since the system will first be filled with fuel and the pressure in it will be restored.
This article was borrowed from the website www.fordbook.ru