Bloody ford tdci's the prob. so many things up wi my engine for 5 year old car service history and 47000 on clock this many things should'nt be going wrong i blame faulty components at assembly. white smoke from cold start and juddering only till cars warm then its fine. diagnosis was egr valve. had new egr valve and manifold but still persisted now there saying faulty injectors so £750 later still none wiser. not very happy person bought car privately 3 week ago so im stuffed.