Volkswagen Workshop Manuals
Passat Sedan V6-3.6L (BLV) (2008)
Maintenance > Tune-up and Engine Performance Checks > Fuel Pressure > System Information > System Diagnosis > Delivery Rate, Checking > Page 1306
Make sure the drain valve lever - C - is closed and levers - A and B - are open.
Activate the fuel pump with output Diagnostic Test Mode (DTM) to build fuel pressure.
Check the fuel pressure on the (VAS 6550).
‹› Specified value: 4.0 to 7.0 bar.
If fuel pressure is OK, check the residual pressure. Refer to => [ Residual Pressure, Checking ]. See: Powertrain Management/Computers and Control
If the Specification is Exceeded
If the pressure relief valve in the fuel filter is faulty, then replace the flange with fuel filter:
Front Wheel Drive (FWD), refer to - item 20 -=> [ Flange with Fuel Filter ] See: Powertrain Management/Fuel Delivery and Air Induction/Fuel
All Wheel Drive (AWD), refer to - item 22 -=> [ Flange with Fuel Filter ] See: Powertrain Management/Fuel Delivery and Air Induction/Fuel
If the Specification is not Obtained
Check the fuel lines for possible restrictions (kinks) or blockages.
If no malfunction can be found:
Replace the flange with fuel filter and pressure relief valve, refer to one of the following:
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