Fuel Pump Control Unit: Description and Operation

Fuel Supply, Low-pressure Side V6 DFI

Control unit for electric fuel pump

Compared with the function described for the V8 models, the control function has the following changes:
- On the Cayenne V6 DFI the delivery rate can be reduced to such an extent that the fuel pressure falls from approx. 82 psi (5.7 bar) to 58 psi (4 bar), depending on the fuel requirement. The low pressure is detected by a pressure sensor for this. The low pressure sensor is installed on the left bulkhead in the engine compartment.
- This control function differs from the V8 engines, which have a constant fuel low pressure of approx. 82 psi (5.7 bar).