GLI L4-2.0L Turbo (BPY) (2008)
Fuel Gauge Sender: Procedures
High Side Fuel Pressure, Releasing
CAUTION!
The fuel injection system is divided into a high pressure side (maximum approximately 120 bar) and a low pressure side (approximately 6
bar).
Before opening the high pressure side - for example, removing the high pressure pump, fuel rail, fuel injectors, fuel pipes or fuel pressure
sensor - the fuel pressure in the high side must be reduced to a residual pressure of approximately 6 bar. The procedure for this is as
follows.
-
Disconnect the electrical connector from the fuel pressure regulator valve - arrow -.
-
Allow the engine to idle approximately 10 seconds.
‹› When the fuel pressure regulator valve electrical connector is disconnected during idle, the pressure in the high side decreases to approximately 6
bar.
‹› After the high side pressure has been released, the high side must be opened, otherwise the pressure increases again due to the warming of the fuel.
-
Switch off the ignition.
-
For safety reasons, disconnect the fuel pump control module electrical connector - arrow - before opening the fuel system.
CAUTION!
Fuel lines are pressurized! Wear protective goggles and protective clothing to prevent injuries and contact with skin. Before opening the
high side, place a cloth around the connection.