Hi All
This car belongs to a customer of my son and after starting from cold it misfires for approx 1 min. After running for 30 seconds or so.It has been smoke tested,coils swapped over, injectors swapped over, new maf, new pcv valve, and new genuine plugs. Every time the misfire returns at the same cylinders.The head-gasket is sound. My son works in Hampshire and as i live in Tamworth its difficult to help him. My question is this.Does anyone have a silver bullet for this fault? if not is anyone near Fleet in Hampshire a BMW specialist that can have a look at this for him.

Thanks for reading
Allan