Power loss 2008 expert 2.0 16v

[Boss hogg]

Hi folks,new to this forum.
Basically my van semi died yesterday,lost power at very low speed (15mph) was chucking black smoke out of the back.
Had been parked up for 12 hours so wasn't warmed up.
I've checked fuel filter etc but they are all new.
Just wondering if anyone has had the same problem.
Vans done 94k. Been serviced regularly with genuine or O.E.parts.