isuzu Workshop Repair Guides

Isuzu Workshop Service and Repair Manuals

Fuel Pressure Regulator Vacuum Switching Valve <--> [Fuel Pressure Control Solenoid]|Specifications|Page 1666 > < Fuel Pressure Regulator Vacuum Switching Valve <--> [Fuel Pressure Control Solenoid]|Specifications|Page 1664
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Fuel Pressure Regulator Vacuum Switching Valve: Description and Operation

Canister And Pressure Regulator Vacuum Switching Valve

PURPOSE

Removes vacuum source to fuel pressure regulator, increasing fuel pressure.

LOCATION

On R.H. fender apron.

OPERATION

For improved starting and idle stability, the system raises fuel pressure slightly on hot re-starts.  The pressure increase is accomplished by cutting
off the vacuum signal to the fuel pressure regulator.  The ECM controls this function through the pressure regulator vacuum switching valve
(VSV) when it senses a hot re-start condition.  This VSV is in an assembly together with the canister purge VSV.

Fuel Pressure Regulator Vacuum Switching Valve <--> [Fuel Pressure Control Solenoid]|Specifications|Page 1666 > < Fuel Pressure Regulator Vacuum Switching Valve <--> [Fuel Pressure Control Solenoid]|Specifications|Page 1664