E90 330i Trouble Starting

Hi Gents

Ok as the title shows, I'm having trouble starting my 330. The problem occurred recently and is only doing it when the car is hot/at operating temperature.

The funny part is that if you got a problem with the battery/coils/injectors and so on the vehicle will fail or battle from cold starts.

Mine only does it after its been parked for a few hours after being driven. If its parked for say 5 minutes or you allow it to cool for an entire day it starts fine, but leave it for 3 hours and it will start but as it gets up to an idle rpm it splutters and the swings for like a second or two longer than normal. A tap on the accelerator helps (now I'm thinking Vanos Solenoids?)

I've ruled the starter out because once it swings and splutters, I immediately switch the engine off and within a second or two I start it again and it starts up normally. Tried this about five times in a row.

I'm confused, need help before I get it checked so I know I'm not being taken for a ride. But for now I'm not really worried about it because the car drives normally.