Engine L3 Turbo
Fuel Delivery Pipe
• The fuel delivery pipe distributes the pressurized fuel to the injectors.
• A fuel pressure sensor is installed at the end of the fuel delivery pipe.
• A relief valve is installed at the other end of the fuel delivery pipe.
• If the fuel pressure in the fuel delivery pipe reaches 13 MPa (130 bar), the relief valve
opens and fuel is returned upstream by the high pressure fuel pump.
• The fuel pressure sensor monitors the fuel pressure in the fuel delivery pipe.
Note: The fuel pressure sensor must not be detached from the fuel delivery pipe. It can
only be renewed by renewing the whole unit.
M6-MPS_01040
1 Fuel injectors 3 Fuel pressure sensor
2 Fuel delivery pipe 4 Relief valve
Service Training Mazda6 MPS Supplement 01-45
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