Colorado 2WD L4-2.8L VIN 8 (2004)
Fuel Pressure Regulator: Description and Operation
FUEL PRESSURE REGULATOR ASSEMBLY
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.
