Table of contents: Pressure relief 🠇 Pressure increase 🠇
Note: Before you begin, please read the warning provided in paragraph 1.
Pressure relief
Caution: The following procedure will only relieve pressure in the fuel system, but remember that fuel still remains in the system components, so use caution when disconnecting any of them.
1. The fuel system referred to in this paragraph includes the in-tank fuel pump, fuel filter, fuel injectors, fuel rail, and the lines and hoses connecting these components. All of them contain fuel, which will be under pressure when the engine is running and/or the ignition is on. The pressure remains for some time after the ignition is switched off and should be released in a controlled manner before working on any of the above components.
2. Disconnect the ground cable from the battery (see "Disconnecting the battery").
3. Some models are equipped with a safety valve, which is located on the fuel rail (figure 7.3). On these models, unscrew the cap on the valve and place a suitable container under the valve. Wrap the valve with a rag and relieve the pressure in the system by pressing on the valve core with a suitable screwdriver. Be prepared for fuel to leak when you press the valve; keep a rag handy. Hold the valve until fuel stops flowing from the valve. After releasing the pressure, screw the cap securely onto the valve.
Figure 7.3. Fuel rail relief valve (marked with an arrow) (1.6L model shown)
[Text taken from the website: peugeotbook.ru]
4. If there is no valve on the fuel rail, you must disconnect the fuel line to relieve pressure. Place a suitable container under the connection and wrap the connection with a thick layer of rags to prevent a possible jet of fuel under pressure from escaping. Slowly release and disconnect the fuel line and collect all leaking fuel in a container. Cap the line/connection to minimize fuel leakage and prevent dirt from entering the fuel system.
Pressure increase
5. After any work on the fuel system, the pressure in the system should be increased as described below.
6. Fully depress the accelerator pedal and then turn on the ignition. Keep the pedal depressed for approximately 1 second and then release it. After this, the ECU should activate the fuel pump for 20-30 seconds to fill the fuel system. After the fuel pump has stopped, the ignition can be turned off.