The Fuel Pressure Regulator in Dodge Charger vehicles is used to regulate fuel pressure in the electronic fuel injection system. It is normally installed on the fuel rail and works by means of a spring and a diaphragm which control the amount of fuel to flow through it dependant on the vacuum created by the engine. When cruising, fuel is returned back to the tank in order to avoid over-pumping while more throttle shuts of the vacuum therefore providing high fuel pressure to feed the engine. Different models of Fuel Pressure Regulators have been used in Chargers over the years especially the adjustable models for modified fuel systems. In its original form, an OEM regulator is fixed, which may prove restrictive the moment high upgrade options such as huge injectors or high yield pumps are integrated. However, alternatives provide for the settings of this parameter and thus enhancing the general performance of the engine as it enables for fine tuning in order to realize the most desirable air/fuel mix ratio.
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