3.2 DSG Stalling,cutting out and hunting

My mates A33.2 DSG has just started to cut out and hesitate for no reason
the vehicle has gone into Audi and there was a Airmass fault logged

it cuts and stalls at idle and when he slows down at lights it cuts out, intermittently

New air mass sensor fitted and the car was fine for a while but then started faulting again

the car plays up more in bad weather and when cold, or seems that way!

Fault logged in the ECU for air mass but this is new and been donor tested with another vehicle

earth points checked and cleaned but fault still preasent.

Audi Tech have mentioned replacing all the inlet manifold seals and throttle body seals, fuel injector seals

Has anyone had similar issues?

Notes on the searchn of this about camshaft adjuster faults stored, but after running VAGCOM on it tonight there is just a Airmass fault

Cheers

Cheers guys for your replies
It is going into a great indi rac-london.co.uk, really recommend them, they have looked after my RS recently and aer vey good

Once Steve at RAC has worked his majic I will do another update

They said there is a small crack poss causing a leak at the flexi joint on the exhaust buy the manifold


will give update later

Car is cutting out and hesitating even on part throttle at idle
no fault codes stored

so now armed with vagom logging every joureny we shall see what comes up?

May get the throttle body cleaned out and readapte it

Mates car came back from Audi Specialist and Audi Dealer with the following:

Tiny hole in the flexi pipe but specialist claims that the Lambda sensor is before the hole so should not cause this issue. The Now be sure that the car does have the same as you are posing but also sometimes stalls. It idles at between 600 and 640 which is below the man spec. Most of the time it sits at 600 post the choke. Man spec is 650. This may be causing it to stall ? Thats with the air con off !!

So first question and suggestion:

DO all of you that have this issue, also have a small hole in the flexi pipe ? If so have you had it replaced with an Audi or performance version exhaust from the manifold to the end pipe ?

Audi and Specialist have a tech fix for this that requires the inlet manifold seal and injector seals to be replaced. My only concerns with this suggestion is 1) its expensive and 2) the issue is very random and sporadic on the cars. The specialist states they would expect an air leak to cause consistently bad running issues ?

Checkout the strange Lambda values on Bank 1 below. Do you all have this ?

Summary:

Ok, many of us have had lost of kit changed but no one has said if they have had the etch fix I was advised carried out ?

The precise issue it fixes is "Sporadic MAF behaviour" faults in the log. Audi found that when the MAF was replaced and returned to them, most of the suspected faulty MAFs were fine, so they suggested this fix for the inlet manifold seal and injectors.


Does anyone know a good after market exhaust from the Manifold to the end pipe ?

Lambda is all over the shop on this car on one bank but that may be the hole in the exhaust?

At Idle: Bank 1 is broken. Note sure if this is the flexi pipe tiny hole?

RPM Lambda Bank 1 Lambda Bank 2
600 -0.8 0.8
600 -1.6 0.8
600 0 0.8
640 2.3 0.8
600 2.3 0.8
640 1.6 0.8
640 5.5 0.8
640 8.6 0.8
640 7 0.8
600 6.3 0.8
600 7 0.8
680 7 0.8
640 5.5 0.8
640 0 0.8
600 2.3 0.8
600 6.3 0.9
600 4.7 0.9