Landcruiser 4WD L6-4.5L (1FZ-FE) (1993)
Vacuum Switching Valve for Fuel Pressure Control: Description and Operation
PURPOSE
The fuel pressure vacuum switching valve is used to raise fuel pressure during hot restart conditions.
OPERATION
During a hot restart, the engine control module energizes the vacuum switching valve which redirects the vacuum supply for the fuel pressure
regulator to the atmosphere. When the vacuum is vented, the fuel pressure regulator raises fuel pressure accordingly.