problems with E46 323I cutting out
i have just bought a 323i 1999. This problem started a couple of weeks ago, I noticed the car seemed slugish. When fuel level is below half a tank, on hitting a bump the car has started cutting out. Able to restart straight away. Refilled tank and fault seems to disappear until back onto low petrol level again. Does anyone know if this is a common problem on these BMW models? Any advice ?