Fuel Pressure Regulator
WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
The fuel pressure regulator is located in the fuel tank and is part of the fuel sender assembly. The fuel pressure regulator is a diaphragm-operated pressure relief valve consisting of a diaphragm, a spring, and a valve. The fuel pressure regulator (2) is inserted into the fuel sender assembly and sealed with an o-ring (1). The fuel pressure regulator keeps the fuel delivered to the fuel injectors at the correct pressure.