I've tried nearly everything now! Initially, I replaced the sparkplugs. Using Vag-com I would get the odd missfire at cylinder 3. Then under hard driving, this missfire would occur in the other cylinders too. None of these Missfires are serious, and so the car still does drive smoothly. However, at various intervals, when the missfire occurs, there is a sudden loss of power (which i initially thought, may have been because of the surging).
After replacing the sparkplugs, I swapped the coilpacks, however, the missfire at cylinder 3 was still present at odd times under idle. Whilst driving hard, the missfires still occured at odd intervals.
I replaced my coil pack wiring harness, as the wires had cracked, aneven this had no change.
My question is, what else can be causing this missifiring? The spark-plugs I got were NGK which were preset gap and so I did not alter these. The car is chipped however.
Can you please post ur suggestions as to what else may be causing the missfires please.