Fuel Pressure Control System

Fuel pressure control system increases fuel pressure slightly on hot restarts for improved starting and idle stability. Fuel pressure increase is obtained by shutting off vacuum supply to fuel pressure regulator.

The ECM controls vacuum supply to fuel pressure regulator by operating fuel pressure control system Vacuum Switching Valve (VSV). Increased fuel pressure will exist for approximately 90-180 seconds after hot restart. Fuel pressure control VSV is located in engine compartment. See Figure-4.