Technician A says that fuel pressure regulators are often located on the return side of the fuel rail. Technician B says that the fuel pressure regulator is located at the fuel tank on vehicles using mechanical returnless systems. Which technician is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because fuel pressure regulators are commonly found on the return side of the fuel rail in traditional fuel systems to maintain constant fuel pressure. Technician B is also correct because in mechanical returnless fuel systems, the fuel pressure regulator can be located at the fuel tank to control fuel pressure without needing to return excess fuel to the tank, thus eliminating the return line.

Technician a Says That Fuel Pressure Regulators Are Often Located