Quiz: What is the purpose of the fuel pressure regulator in a fuel March 30, 2025 by Alex Turner What is the purpose of the fuel pressure regulator in a fuel injection system? Discover more about Vehicle Engine and Automobile at our home page. A) To maintain the correct fuel pressure in the fuel rail B) To filter impurities from the fuel before injection C) To control the air-to-fuel ratio during combustion D) To regulate the temperature of the fuel before it reaches the engine Submit Answer