L3 Turbo Engine
Fuel Tank Side
M6-MPS_01033
1 Fuel tank 3 Fuel pump unit
2 Rollover valves 4 Pressure regulator
Returnless Fuel System
• Fuel is pumped out through the fuel pump, filtered by the fuel filter, and then regulated to
a specified pressure by the pressure regulator.
• The pressure regulated fuel is sent to the high pressure fuel pump.
• The returnless fuel system reduces fuel evaporation in the fuel tank.
• The pressure regulator located in the fuel tank prevents fuel return from the engine
compartment side, thereby maintaining a low fuel temperature in the fuel tank. Due to
this, formation of evaporative gas produced by a rise in fuel temperature is suppressed.
End Of Sie
01-34 Service Training Mazda6 MPS Supplement
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