Black smoke from diesel

[bodgit]

I know its normal to get black smoke from a diesel but yesterday my 2.0tdci cmax 55 plate was blowing a hell of a lot out, cars behind were dropping well back and my tailgate is covered in crap. I did a round trip to Cardiff 300 miles and noticed under load it spewed it out in large quantities. Car has never had any engine faults before and has been serviced according to book specs. Recent oil/ air filter done 1200 miles ago. I did notice little bits of smoke before but thought it might have been because the dealer overfilled the oil.
Anyone got any ideas what may be the problem. Up to now Im thinking faulty injector or turbo seals but have no real idea.

[Big G]

black smoke is usually linked to too much fuel. I make a habit of nailing mine to the red line every week or so to clear it out

[markwilliamson2001]

Doubt its turbo, thats normally blue smoke. Take it to a reputable local garage, they will be able to diagnose it better.

[MatJohnson]

Nowt wrong with a cloud of smog, if its blue, watch out. My TDCi blows a lot of smoke, as others have said, let it warm up first them give it a bit of a rev and watch the crap blow out

[bodgit]

The cardiff run is the third I,ve done in the last three weeks and I noticed the mpg drop from the usual 51-53 down to 48mpg. Performance still feels very strong but as I say the amount coming out is way beyond normal. The car has only done 52000 miles with full service history. Before the last oil change it barely gave out any smoke under acceleration.
I put in some diesel treatment in Hereford but that made no difference and I did give it some stick to the rev limiter.

[MRD]

Its usually white smoke for a blown turbo, Blue for burning oil and black for over fueling.

Could it be something to do with the particle filter either?

My guess is that there's a dickie sensor somewhere and its over fueling. If you get it on a Diagnostic PC it should show up any problems .