Fuel Pressure Regulator: Description and Operation

Fuel Pressure Regulator:

DESCRIPTION
The fuel pressure regulator is mounted to the return end of the fuel injection supply manifold. It is controlled by manifold vacuum and will maintain fuel pressure between 255-314 kPa (37-46 psi). To prevent percolation of the fuel during idle after the engine is restarted, vacuum is cut to the fuel pressure regulator for approximately 120 seconds increasing the fuel pressure.

FEATURES
The fuel pressure is also increased in the following situations:
- When the intake air temperature is above 20°C (68°F).
- When the engine coolant temperature is above 70°C (158°F).