The electric fuel pump feeds pressurized fuel through a fuel filter to the fuel injectors via the fuel rail manifold. The fuel rail contains the fuel pressure regulator which ensures that the fuel injectors receive fuel at a consistent and known rate. Excess fuel bled off by the pressure regulator returns to the fuel tank through the fuel return line.
The fuel injectors are fed fuel by the:
fuel pressure regulator |
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fuel return line |
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electric fuel pump |
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powertrain control module |