A3 bmn engine 170 hp. Car ran really well till xmas day.It started to misfire occasionally about 3000rpm. whilst accelerating hardish.It feels like complete momentary electrical failure to injectors.If I accelerate slowly to past 3000rpm it doesn`t do it.No dash lights. VCDS shows nothing.Engine and gearbox were removed about 3 weeks ago but all was ok until a couple of days ago.I`ve wiggled all the connections with engine running but can`t get it to miss. Anyone any ideas?