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look at the solenoid valve under the air filter housing. They are prone to cracking... Vaccuum escapes when under harsh loads.

Struts are covered with a goodwill gesture from Audi u.k. 5 years or 75k.
Providing you have spent at the dealership and shown loyalty to the brand. 100 % covered mate
Also get the chargers changed

you have an air leak . check and change the vac valve under the air filter housing. Can be seen if you remove the wing liner on O/S/F

Take a look under the air filter housing.There is a vacuum valve under there which is prone to splitting on the bottom edge. You can access this part via the o/s/f wing liner. Replace this valve and you will all be surprised of the running difference. Especially at high RPM and speed. The valve "spl...

Been talking to dealers today, Software 090 is cold start issues,there is common issues on these engines with the vaves coking up hence high revs after software version 090. Blah blah, This is not my concern though,all coil packs when scoped on r/t are all good.

Hot or cold this happens so i can rule out oil temperature, As stated i only use the high octane fuel,i have had this problem for some time..

car is warmed up,can replicate at about 5,000 rpm more or less WOT,spark plugs have been replaced and coil packs are all good.Dealer says no faults in their 5052B diag equipment.
Does feel like a fuel restriction but i am no nearer.

HELP, I have an 06 plate RS4,@6,000 rpm there is splutter/hesitation for 2-4 seconds.Taken to dealer who cannot fault,no faults in any system,the ECU software version is the latest 090,ive been asked what octane i,m running on,which of course the dearest 98ron, anybody ANY ideas,this is an annoying ...