Hi folks For the past year my a3 1.8t has had intermittent misfires/rough idling issues. The first time it happened I took it to a garage and have no idea what they did but it cost £40 and ran smooth as silk after. A few months ago the same issues happened, and, after some research, I unplugged the throttle sensor plug, DC the battery, re connected, and the problem was sorted. Then the other day, after hastily pulling out of a car park with the engine cold, it started to miss again. I found a possible remedy for this, which would be taking out the MAF sensor and cleaning it with contact spray. This I did, and the moment I had a look at it I had doubts as it looked fairly new. Sprayed it, and there was no dirt come off whatsoever. While I was doing the work I checked all the vaccum hoses, and every one is fine with no cracks/splits. The stage Im at now is as before. When the MAF sensor is plugged in, it is rough and misses, and when I un plug the MAF sensor, it stops misfiring but still idles rough and feels restrained when I drive. Sorry for rattling, just want to note everything I have tried so far. If anyone may no a cause for this I would be uber grateful Thanks in advance. PS, coilpacks were changed by audi and car is due for service in next 1000 miles.