Fuel Pressure Control Valve

Fuel Pressure Control Valve
The Fuel Pressure Control Valve is part of the fuel meter cover, and contains an air chamber and a fuel chamber that are separated by a diaphragm-operated relief valve and a calibrated spring. The regulator's function is to maintain constant pressure drop across the injector at all times. Fuel pressure is regulated by the difference between fuel pump pressure acting on one side of the diaphragm and the force of the calibrated spring (and air cleaner air pressure) acting on the other side.




The system operates in an acceptable pressure range of 62 to 90 kPa (9 to 13 psi). The fuel meter cover includes a bleed that relieves system pressure when the engine is turned "OFF". The bleed also helps purge vapors from the injector and regulator after a hot restart.
The Fuel pressure control valve is serviced as part of the fuel meter cover and should not be disassembled.
If the Fuel pressure control valve in the Throttle body fuel injection unit supplies pressure which is too low (below 62 kPa or 9 psi), poor performance could result. If the pressure is too high, excess emissions and unpleasant exhaust odor may result.