• The PCV governs the fuel pressure that is delivered to the fuel injectors via the high pressure fuel rails and fuel supply tubes.
• The PCV also acts as a dampening device for the fluctuations in pressure that occur during fuel delivery through the pump and the injection process.
• The PCV is controlled by the ECM to maintain optimal fuel pressure throughout all engine operating conditions.
• The PCV is permanently mounted to the high pressure pump and is not to be removed.
Removal of the PCV will result in replacement of the high pressure fuel injection pump.
NOTE: Fuel caps have been left off for visualization purposes. Always use fuel caps when servicing the high pressure fuel system!
