206 1.4 hdi exhaust smell

hello everyone, I have a 2003 model 295k vehicle, the engine was made before, the oil cooler exploded and was changed, the oil was changed, the turbo air box was changed, the inside of it was melted, but since I bought the car, there is a smell coming from the middle of the car, rather than the exhaust, the smell decreases as it gets hotter in the mornings, but can't say the smell is gone, How can I be sure whether it is burning the fuel raw or the catalyst is leaking or burning oil

If the catalyst is full, it will smell. Well, when the vehicle makes bottom gas, smoke, etc. Is there

there is an odor at idle, no smoke, after warming the car up at idle for 5 minutes, it emits smoke between 25-30 rpm, and the smell also increases, the smoke between 65-70 temperature is less, the smell continues, /span>

temperature is around 85-80, the smell decreases, the smoke also decreases well or does not come out at all, the air temperature is between 9-15 degrees, does this car burn oil or is it soot somewhere? there