Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Observe the Following if Test and Measuring Instruments are
Required During a Test Drive
WARNING
♦ Test and measuring equipment must always be secured to
the rear seat and be operated from there by a second per‐
son.
♦ If test and measuring instruments are operated from the
front passenger's seat and the vehicle is involved in an ac‐
cident, there is a possibility that the person sitting in this
seat may receive serious injuries when the airbag is trig‐
gered.
1.2 Clean Working Conditions
Even minor contaminations can lead to malfunctions in the fuel
injection system. When working on the fuel supply/injection sys‐
tem, pay careful attention to the following rules of cleanliness:
♦ Before loosening, connections and surrounding areas must be
cleaned thoroughly with engine or brake cleaner, and then
cleaned area must be dried completely.
♦ Plug open lines and connections immediately with appropriate
protective caps.
♦ Place parts that have been removed on a clean surface and
cover them. Do not use fluffy cloths!
♦ Only install clean components: Only unpack replacement
parts immediately prior to installation. Do not use parts that
have been stored unpackaged (e.g. in tool boxes etc.).
♦ When the system is open: Do not work with compressed air.
Do not move vehicle unless absolutely necessary.
1.3 High-Pressure Fuel Injection System,
Pressure Relief
♦ The fuel injection system is separated into a high-pressure
section (max. approximately 110 bar) and a low-pressure sec‐
tion (approximately 6 bar).
♦ Before opening the high-pressure section - e.g. removing the
high-pressure pump, fuel rail, fuel injectors, the motor for in‐
take manifold runner control valve or any other component or
fuel line that is located in the high-pressure section of the fuel
injection system - the fuel pressure in the high-pressure sec‐
tion must be relieved to a residual pressure of approximately
8 bar. The procedure for this is as follows.
Special tools and workshop equipment required
♦ Vehicle diagnostic, testing and information system -VAS 5051-
with diagnostic cable -VAS 5051/5A-
Work Procedure
– Start engine and run at idle speed.
Audi A6 2005 ➤
Fuel Injection and Ignition - Edition 03.2008
2 Rep. Gr.24 - Fuel injection system
To Next Page
Loading...
Need help?
General
