Hi Guys,

I have a 2002(51) A4 3.0 Quattro Sport (Auto). When I start up at cold, the engine sounds awful. Almost as if there is a cylinder not firing. There's vibration through the car and the exhaust note sounds like the the car is "chugging". Revs are around 1200.

However......

Once it's had about 2 mins of running, the engine returns to a steady idle of 750-800rpm, but it's not as smooth as usual. The power in the gears feels a bit lacking, but nothing too drastic, just a bit less lively than I expect.

I have ordered a USB Cable and have VAG Software, but have ZERO clue how to use it anyway

Any thoughts would be most welcome.

Thanks
Pete..