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Home >> Chevrolet >> 2001 >> Cavalier LS, 2.2 4 >> Repair and Diagnosis >> External Pages >> Different car >> Section 212 (Engine Controls - 2.2L (L61) Introduction) >> Description and Operation >> Fuel System Description >> Fuel Pressure Regulator Assembly

Fuel Pressure Regulator Assembly

WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The fuel pressure regulator is a diaphragm relief valve. The diaphragm has fuel pressure on one side and regulator spring pressure on the other side. Fuel pressure is controlled by a pressure balance across the regulator. The fuel system pressure is constant. A software bias compensates the injector on-time based on the signal from the MAP sensor.

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