Peugeot 2008 diesel 1.6 blowing out black smoke, any idea what it could be ?

[Phillipr]

Hi there i have a Peugeot 2008 Diesel 1.6 which is blowing out black smoke.
We have had the car from new and its done 70K , we have had a new turbo , mass airflow and intercooler on it but still no joy .
We have changed the oil and filter and changed the air filter, its supposed have had the DPF done and injectors checked but still no joy.
Has anybody got any idea what it could be, please?

Thankyou

 

[Shaggy]

we have had a new turbo , mass airflow and intercooler on it but still no joy .

That's a bit over my head, but with the turbo, MAF and intercooler already done I'd be asking about the EGR valve next. They clog up on the HDi engines and a stuck one can cause black smoke, and a split boost hose can do it too. Did the smoke come on suddenly or get worse over time?