LX 450 L6-4.5L (1FZ-FE) (1996)
Fuel Pressure Control Solenoid: Description and Operation
System Schematic
The ECM turns on a VSV (Vacuum Switching Valve) to draw the air into the diaphragm chamber of the pressure regulator if it detects that the
temperature of the engine coolant is too high during engine starting.
The air drawn into the chamber increases the fuel pressure to prevent fuel vapor lock at high engine temperature in order to help the engine start
when it is warm.
Fuel pressure control ends approx. 1 20 sec. after the engine is started.