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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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RETURNLESS FUEL SYSTEM [SKYACTIV-G 2.0]

Outline

  • The returnless fuel system adjusts the fuel amount (fuel pressure) ejected from the fuel pump, returns unnecessary fuel in the fuel tank, suppresses temperature increase in the fuel, and reduces fuel evaporation in the fuel tank.

System Diagram

Structure

  • The returnless fuel system consists of the following parts:

Part name

Reference

Fuel filter (low-pressure)

(See FUEL PUMP UNIT [SKYACTIV-G 2.0].)

Fuel filter (high-pressure)

Pressure regulator

Fuel pump

Operation

  • Fuel in the fuel tank is pumped out through the fuel filter (low-pressure) by the fuel pump, filtered by the fuel filter (high-pressure), and then regulated to a specified pressure by the pressure regulator. The regulated fuel is sent to the high pressure fuel pump, and unnecessary regulated fuel is returned from the pressure regulator to the fuel tank.

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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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