Citgroen Xantia HDI, smoke problem

Hello, I have an Xantia HDI of 90CV and the problem that has to have a few hours when starting a lot The few minutes is perfect. If someone can help me ... thanks

Friend of Gasoil I do not know much, but it could be the gums of the valves that are discarded already ... I explain that when the car is in cold the gums are retracted and sure there they pass some drops of oil which causes the smoke, when the car heating they expand which seals the holes and stops humming, well I think that I think yop ... in the same way luck and salu2.

The escape tube emits white and blue smoke in large quantities
before this symptom it is necessary to investigate the cause following the same order indicated below:
1. Ensure that the fuel contained in the tank is automotive diesel and that the client has not come to other mixtures.
2. Verify that the oil level in the crankcase is not excessive and is above the maximum level indicated in the rod.
3. See that there is no good air presence inside the fuel feed circuit.
4. Verify that the EGR valve is not blocked in an open position and also check the state of the EGR valve butterfly, as it may have stuck and remain in permanent closed position.
5th Check the possible succy state of the air filter and also that the intake manifold is not clogged.
6. Verify the reaspiration circuit of oil vapors to verify that everything is in perfect order.
7. Verify that the turbocharger does not have oil losses in the circuit of its grease and through its rotation axis.
8th Check the proper functioning of the fuel pressure collector,
9. ° Check the proper functioning of the atmospheric pressure collector, which is located in the same EUC box
10. possible very poor state of the mcor. Check your compression and observe that there are no possible symptoms of ovalization of the cylinders.
11. Review the status of the coolant temperature probe to see if it provides resistance values ​​according to its temperature.
12. Another cause of mechanical origin would be the lack of tightness of the valves that should be prepared and adjusted again.
13. Verify that the breakdown is not in the high pressure regulator of the fuel or in the same high pressure pump, especially for mechanical defects of these mechanisms

Hello, what you have to check the injectors, some of them are dripping and downloads the fuel that it has on the line causing it when the starts throw you smoke until it burns all the fuel in the camera and it also fails.

Hello, first of all, thank you all for answering, I will make some clarifications:
the smoke that comes out of the escape is of diesel (by the smell) is all the maintenance recently made, as I said the injectors and probate them in another car and they go well, the oil does not decrease, the egr I have annulled, the turbo has the normal olgure.
I already think about electronics ...