I have a 1999 model 1.8 petrol A4 b5 saloon; again it's full Audi service history.. I serviced it myself 3 days ago, as its 20 years old not worth taking to the stealer ship anymore..my car is hesitant under acceleration and misfires when reved past 4k..any ideas? I didn't change the fuel filter.
And maybe I should check all the earth connections.