Black smoke on acceleration

[rburnham11]

Black smoke is definitely passing the dpf. pressure readings? how can I find this out? I have a icarsoft MB v2 which I have updated but I still struggle to get it to do half the stuff its capable of

 

[91dm]

If you go onto view data under the engine ECU it should give you 'differential pressure'. Be interesting to see at 2.5-3k revs is the reading very low. Also look for regen frequency or distance since last regen.

What year and model is the Vito, I don't see it listed on earlier comments?

 

[rburnham11]

It's a 2011 mercedes viano 2.2.
Question though, should mercedes not have done this when they had it? They advised me to have the exhaust cleaned. Is this a thing? Do people clean exhausts? Clearly the cat/dpf are not doing their job if it's honking out this much black smoke. That's why I planned to take exhaust off clean it and maybe gut the cat and dpf before replacing but surely that would let more smoke out.

 

[91dm]

Is that EURO 4 or 5, if 4 it won't have a DPF?

Yes DPF cleaning is a common thing, can be done on or off the car.

To me it sounds like another issue that is causing the excess smoke and unburnt diesel. I would do a smoke test on the air side to check for split pipes or a cracked manifold and then move onto injector readings etc to check fuel readings.

 

[rburnham11]

I don't know if it's a euro 4 or 5. So I still think it's something causing it to run very rich. The intercooler pipes have been changed, the intercooler itself has been changed, it's been smoke tested by at least 2 places.

 

[91dm]

Do they know what the boost reading is from the turbo?

 

[91dm]

If you type your reg into totalcarcheck.co.uk it will show you what the Euro status is.

 

[rburnham11]

It's says 5a for euro thingy.
I don't know about boost reading. Is there anything that wouldn't show up on a smoke test until under turbo boost pressure?

 

[91dm]

The boost reading will tell you if the turbo is creating the correct pressure. If it was only making half the boost it would explain it however should log a fault and you would notice low power.