Fuel Delivery: Operation
WARNING: This page is about a different car, the 2006 Chrysler Crossfire. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The check valve maintains the volume of fuel in the fuel rail and lines, not the fuel pressure.
The Fuel Pump draws fuel through a strainer and pushes it through the motor to the outlet. The pump contains a check valve. The valve in the pump outlet maintains the volume of fuel during engine off conditions for a short while. It is normal for fuel pressure to drop to zero after cool down. The Fuel Pump Relay provides voltage to the Fuel Pump. The Fuel Pump has a maximum deadheaded pressure output of approximately 9.0 kPa (130 psi). The Regulator adjusts Fuel System pressure to approximately 3.7 - 4.1 bar (54 - 60 psi).