Hi Phwspider and Mat B159,
Thanks for your sugestions,
I also thought that the EGR valve may be part of the problem but have already had this cleaned out twice this year , the car has done a total of approx 35,000 miles, my car also runs very lumpy on start up (mainly when left for a time ), the garage have just replaced all 5 injectors which has not cured the problem of the lumpy starting they seem to be at a loss as to why it runs lumpy, no engine warning lights showing,any body got any ideas about the lumpy running.
ps the car is still under a garage warrenty, so far all work has been covered by them. They had the car for 3months last year, and as good will gesture replaced the cam belt, water pump and the front and rear badges (that had started to delaminate) for free.