Fuel System Bleeding - Audi A6 Repair Manual

1.4

Fuel System Bleeding

To prevent damage to catalytic converter the fuel system must be
bled after repair work on fuel lines or on fuel filter.
Work procedure
– Start engine and let engine run a few minutes at average RPM
and then turn off again.
Note
At the beginning, engine may run roughly due to air in fuel supply
system.
– Check fuel supply system for leaks.
– Check DTC memory and, if necessary, erase.
– Then perform a road test with at least one acceleration at Wide
Open Throttle (WOT), then fuel supply system must be
checked again for leaks.
– Check DTC memory and, if necessary, erase it. After DTC
memory is erased, a readiness code must be generated for
the engine control module using operating mode "Guided
Fault-Finding" ⇒ Vehicle diagnosis, testing and information
system VAS 5051.
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with respect to the correctness of information in this document. Copyright by AUDI AG.
Fuel Injection and Ignition - Edition 03.2008
Audi A6 2005 ➤
1. General Information
5