We received a 2000 Audi A6 V8 with a Check Engine Light on. The vehicle did have a rough idle. We downloaded the codes and found codes: P0300, P0301,P0302, P0303, P0304, P1114, P1340. We noticed that all the miss fires where on the passengers' side of the vehicle. We recommended removal of the valve covers and inspection of the camshaft chain adjusters. 
We found that the passengers' camshaft chain adjuster had completely failed. 
And that the drives' side adjuster was weak and about to fail.
The customer was extremely luck that the the drivers' side camshaft timing chain had only jumped one tooth. If it had come off, major valve and possibly engine damage would have occurred.
We replaced both camshaft timing chain adjuster and since the timing belt has to be removed to remove the cam shafts and the cam shafts have to be removed to remove the cam shaft adjusters. We recommended replacement of the timing, belt, water pump, idlers and tensioner while the vehicle was apart.
If you are looking for a GREAT shop in the Temecula, Murrieta area that REALLY knows Audis. Give us a call: (951) 225-1131... You will be so glad you did !!!!!
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