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Home >> Oldsmobile >> 2004 >> Bravada AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.2L (Introduction) >> Description and Operation >> Fuel System Description >> Fuel Pressure Regulator Assembly

Fuel Pressure Regulator Assembly

Fig 1: Cross Sectional View Of Fuel Pressure Regulator Assembly
GM69059Courtesy of GENERAL MOTORS CORP.

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. The fuel pressure regulator maintains a constant pressure differential across the fuel injectors under all operating conditions.

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