Cold starting

I have a E39 540i touring and am having a problem when I start up in the mornings , it starts but will not run properly it spits and miss fires untill its warmed up after about 2 or 3 minutes then it is ok for the rest of the day, I was just wondering if there was a cold start unit or something that was playing up or not working , I have had it checked on laptop and nothing shows up apart from the miss fire , I hope someone will be able to help me please

Roger

I take it no one has had this as a problem then !!

All sorted now it was the Air flow meter , put a new one on and its all going well again