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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.
Audi A6 2005 ➤
Fuel Injection and Ignition - Edition 03.2008
1. General Information 5
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