Steve Q

I'd get this into a garage asap. Let's hope it's a chain and not the crankshaft etc. 

This link might help: 

https://www.audiworld.com/forums/a4-b8-platform-discussion-128/random-dying-cold-start-3068600/

This link might help with the sloshing 

https://www.audizine.com/forum/showthread.php/624964-Water-sound-behind-dash

This link and video might help: 

https://www.audi-sport.net/xf/threads/159097/

I'd recommend a diagnostic check to see if any fault codes flag up or get an auto electrician to take a look. 

Traveling 

Welcome to the forum you'll find the members on here are a friendly and helpful bunch 🙂 

Thank you 

Just now, Ian1975 said:

I fitted a ram air 4weeks prior, I’ve got a new maf sensor coming tomorrow, so I’ll take it from there.

Please keep us posted on how you get on. It could be the ram air causing the issue. Might be worth reverting to stock to see if that cures it.  

2 hours ago, gsmdo said:

So, I picked up the convertible this morning — a total bill of £420. Driving very well indeed.

I've asked Norwich Audi to quote for replacing the camshaft — along with a new cam belt (it had a cam belt done when the cam was fitted, but I'm not a fan of re-tensioning important belts).  I'm away on holiday for the first couple of weeks of September, so I'm going to leave it with them for that time to get the job done.

Running an old Audi sometimes feels like being in a bad relationship — it's cost can be staggering — but I love the car…  😆

I'll add to this thread when I get the car back in mid-September.

Mike 🙂

 

It certainly is! No matter how old the cars get the bills and parts remain expensive 

Base

Welcome to the forum you'll find the members on here are a friendly and helpful bunch 🙂 the Highlands are beautiful where abouts are you based? 

Not sure to be honest. You didn't fit an aftermarket air filter at the same time did you? 

I ask as the additional air coming through the maf sensor might be throwing it off. 

Fair enough, was just thinking because the cat had been removed. Was there a sensor in the cat? 

1 hour ago, kierann said:

Still no update unfortunately, i am trying to find someone who can rebuild the engine for me in Hull area, so far not much luck.

 I know how that feels. As I've been in the same boat. 

When modifying the exhaust has the lambda sensor been damaged etc? 

Shut 

Centre

3 hours ago, John-N,Wales said:

Hi all 

Just joined today 

heres my pride and joy  2010 A6 2.0 TDI 170 Le Mans 

Looks stunning. Great spec of C6. 

4 minutes ago, GR-S5 said:

Oslo next year

Very nice. One of my friends who's a member on here lives in Bergen. 

 We're the injectors ok then? 

On 7/8/2025 at 5:13 PM, Pauline S.S. said:

Hi all. Thanks for the advice about the fault. 
Back from Audi garage. Fault found with replacement switch I bought. They’ve done a diagnostic check and fitted  new one. All OK now. 

Glad you got sorted 🙂

That's interesting I hadn't heard that. But must be some truth in it as per your experience. So glad you got sorted 🙂

Welcome to the forum you'll find the members on here are a friendly and helpful bunch 🙂 The symptoms indicate the bag. But this is unlikely if it was replaced with a new good quality one. 

Id recommend a second diagnosis from an independent Audi specialist.  

Could get the injectors tested for peace of mind. Could be the injector seals? 

Could ideally if cleaning the carbon build up. If you're replacing the water pump you may as well do the cambelt.