What are the characteristics of a returnless fuel system?

What will be an ideal response?


Typical fuel pressure regulators have a return line to the tank. Returnless systems have the fuel pressure regulator and filter mounted in the gauge and pump cluster mounted in the top of the fuel tank. The regulator exhausts excess fuel pressure directly to the tank.

Returnless systems have only one fuel line between the fuel pump and the fuel rail to the injectors. Unlike looped injection systems, no return line runs from the fuel rail back to the fuel tank.

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