Looking for any advice on what may be causing this, the car runs perfectly when cold but develops a misfire and has a very noticeable lack of power once warmed through. It can also be difficult to start once warm. Anyone had the same fault?
Thanks for the replies guys, I've got a 328i with the same engine so I'll swap over the coil packs to see if that cures it, if not I'll have the codes read.
