Hi .. I have a 57 plate allroad 3.0tdi. If does not have dpf. When cold it accelerated and behaves like it should without smoke. However once warm it will hesitate blow black smoke and once the gearbox shift down a cloud is produced before the car takes off. It happen s every time even after a long run on the motorway. So I have new egr . new intake manifolds. Cleaned all intakes intercoolers and pipes and revealed the onces at front end. Cleaned amd pressure tested the egr cooler . The turbo has had the mr muscle clean on it and no play in it. The injectors or in spec according to vcds.. it flew past the mot. Yet it is almost undrivable because of this smoke. I can boot it hard when cold with black smoke only above 4.5k rpm. Once warm I have to keep it high revs to avoid a lot of black smoke. Could it be injector seats need changing? Is it as simple as an intake temperature sensor or may or map ? Could it indeed be the injectors ?