I'm crossposting this because there seem to be some issues floating around with FSI engines that misfire at cold start, hesitate, and/or end up having deposits on the intake valves.

There are two TSBs out, one on misfire problems on FSI engines, and one of fuel quality problems. Audi is claiming that misfires and deposits on FSI engines are being caused by bad fuel, according to my service tech.

Be aware, if you have any issues at all, and you have an FSI engine, get your car into the dealer.<ul><li><a href="http://forums.audiworld.com/rs4b7/msgs/46676.phtml">Misfires and fuel</a></li></ul>

I've had this problem now for the past 4-5 months &amp; although since taking to the dealer I haven't had much problems lately I want to make sure that I have some ammo to take with me the next time during service.

The problem seems to be going around with some FSI engines and not others. I don't think Audi has a handle on it, but it seems to have some visibility from the factory now. If dealers encounter the misfire issue, they are supposed to contact AoA for direction.

Thanks for post.

I am already rotating name brand gas stations and am keeping the receipt - as proof not buying some stuff that doesn't belong into our cars.

Audi's from a 2.8 A4, 3.0 A4 &amp; B6 S4 &amp; never had any problems &amp; my little 2.8 had 65K miles on it when I bought it &amp; I put another 30K on before trading it in. I raved &amp; raved about how dependable &amp; trouble free Audi's were until this C6 A6.

Maybe it's unfair to chastize Audi over one car &amp; maybe some of us got the one built on a Monday or after a drunken stupor weekend but I've almost had it with the Service or the lack of &amp; unwillingness to correct or do updates when they know good &amp; well they have the capability to do so!!

Hate to say it but if it wasn't for the fact that I see Beamers &amp; Mercedes all over the place in So. OC I probably would have left a while ago.

Also, you know they have people watching &amp; reading these posts every once in a while but you've never seen a post from a tech or Service guy standing up for their departments. I think they know.

Here's some ammunition. Service is supposed to contact AoA for direction.


------------beginning of TSB -----------
Technical Service Bulletin

MIL on - misfire DTC stored after cold start

01 07 02 Feb. 8, 2007, 2011719/3. Supersedes Technical Service Bulletin Group 01 number 06-04 dated Mar.
15, 2006 due to updated reference to another TSB.

Model(s) Year VIN Range Vehicle-Specific Equipment
A3 2006 All 2.0L TFSI R4 Engine
A4 2005 - 2006 All 3.2L FSI V6 Engine
2.0L TFSI R4 Engine
A6 2005 - 2006 All 3.2L FSI V6

Condition
Sporadically, after cold start, the engine may run slightly rough for a few seconds and the MIL may illuminate with a DTC for misfire on one cylinder only (P0301, P0302, P0303, P0304, P0305 or P0306) stored in ECM data memory. The rough running condition disappears a few seconds after cold start and does not exist with a warm
engine.

Technical Background
Not applicable.

Production Solution
Not applicable.

Service
* Follow normal Guided Fault Finding Diagnosis.
* If diagnosis results are inconclusive, do not carry out any repair or replace any part.
* If condition persists, contact the Audi Technical Assistance Center for further assistance.

Tip: For 3.2FSI Only: Ensure Technical Service Bulletin 2010890 Cold engine runs rough or stumbles;
warm engine may stall when engaging gear and vehicle is stationary has been performed.
-------------------------------------------------

N.B. - That referenced TSB 2010890 was the ECU update that was supposed to fix misfire problems on the 3.2L FSI engine a few months back.