A8 Parts Forum  

Go Back   A8 Parts Forum > A8 D3 > D3 - Fuel and Exhausts

D3 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again

Thread Tools Display Modes
Old 21st March 2018, 08:31 AM
madcjd madcjd is offline
Senior Member
Join Date: Apr 2011
Location: Staining, Lancashire
Posts: 232
Default Priming the fuel filter using vcds

Hi all.
Just replaced the fuel filter on my d3 A8 4.2 tdi.
I intended using VCDS to operate the fuel pump to prime the system (as recommended).
However, when I go into the ENGINE section and then into the relevant section, code 35 pertains to a brake operation and there is no drop down list to select pump operation.
Any ideas anyone?
Btw, VCDS has correctly linked to and recognised my car.
Graphite grey 2016 q7 3.0 (4m)
Night blue - 2005 D3 4.2 TDi LWB
My pride and joy - 1991 ur 20v quattro (owned since 2003).
BMW 645 (Need to sell now I have 2 A8s....)
Previous cars
A8 D4 4.2tdi lwb (2011)
A4 cab 3.0 Quattro petrol (2005)
T5 Caravelle exec 2.5 (2006)
A8 D2 3.7 quattro sport (2001)
A8 D3 4.2 quattro (2003)
A6 4.2 quattro avant (1999)
A6 2.8 quattro (1998)
Audi Coupe 2.6E (1993)
Carlton 3.0 GSI
Reply With Quote
Old 21st March 2018, 08:43 AM
snapdragon snapdragon is offline
Senior Member
Join Date: Nov 2011
Posts: 1,669

I used to do what you said with the Passat but on the A8 it says...

Fill new filter with clean diesel fuel. This will enable the engine to start more quickly.

Bleeding fuel system
Due to the design of the engine, with a fuel system pressurisation pump located in the fuel tank, it is not necessary to bleed the fuel system.
The fuel system bleeds itself when the starter is operated.

So I just get a bit of diesel (~300ml) in a clean bottle or jar when filling up and fill the filter with a clean jug (very important no particles get into this diesel). You could probably use paraffin if you have some.
Reply With Quote
Old 5th April 2018, 02:02 PM
paulrstaylor paulrstaylor is offline
Senior Member
Join Date: Jul 2010
Location: Manchester
Posts: 1,291

Or if the same as the 4.2TDI - just crank it, takes <20 seconds to self prime an empty filter
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT. The time now is 05:04 AM.

Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.