2003 BMW 318i misfire with fuel cut off

Roughly 6months ago the eml came on whilst driving and the car noticibly lost power and became lumpy, when I got it checked on diagnostic computer it showed as misfire on cylinder 2 and 3 with a fuel cut off. We replaced said coil packs on cylinder 2 and 3 along with plugs which solved the problem but again roughly 2/3 months later same thing happens again. Done all the checks again and this time it was a misfire on multi cylinders with fuel cut off. Any advice because its really annoying me now:-)