190E 2.3 (201.028) L4-2.3L (102.985) (1987)
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Fuel Pressure Regulator: Description and Operation
Fig. 13 Fuel Pressure Regulator
The primary pressure regulator, Fig. 13, is a variable resistance in the fuel return line from the fuel distributor. The function of the regulator is to
maintain a control pressure that is a constant 0.4 bar (5 psi) below the system pressure.
