Definitely check your air filter. If you are using an aftermarket filter, and the maker uses the same filter for both the normally asthmatic diesel and the turbodiesel, you probably don't want it. The genuine VW filters for the turbodiesel have significantly more filter media surface area than the one for the normally asthmatic 1.6D.
Also, your profile doesn't say where you are from. At high altitudes, the factory standard adjustments on the pump might be delivering excessive fuel. Get all the air you can into it (correct air filter, clear all the pipes, maybe use a larger inlet pipe), and at that point, if it still smokes, you can turn the full load fueling back to match the air you are getting.