S10/T10 P/U 2WD L4-151 2.5L (1988)
Fuel Pressure Regulator: Description and Operation
TBI Pressure Regulator & Injector
The pressure regulator is a diaphragm-operated relief valve with system operating pressure on one side and and atmospheric pressure on the other side.
The function of the regulator is to maintain a constant pressure to the injectors at all times, by controlling the flow in the return line by means of a
calibrated bypass.
NOTE: The pressure regulator on this unit is serviced as part of the fuel meter assembly and can be disassembled.
