Ducato Black smoke

[Powerfull pierre]

Hi I’m a newbie so be gentle.
I have a Ducato 250 2008 3.0L 160 motorhome. It has done only 30k.
I must tell you I’m a diesel engineer by trade with a lot of years behind me. I know my stuff but this is causing me to pull my hair out.
When I pull away it black smokes until it hits about 2000 rpm then it’s fine, just like turbo lag. No warning lights & it drives & pulls like a train.
It has had a new modified Pierberg throttle valve & loom but I am unable to set adaption. Do these need resetting after the mod? It shows ok on live data 87% & 5% which is ok.
I have checked everything & no faults but turbo is slow to boost & only reaches about 1.5 bar. Turbo is perfect, clean & spins free. waste gate perfect, boost pipes no leaks. Egr clean no leaks or blow bye ( have blanked) cat clean as a whistle exhaust flow fine. Fuel pressures spot on. Maf spot on. New o2 sensor & new maf fitted. Obviously a/f & f/f fine . I’m hoping it’s to do with the throttle valve as I believe they work differently to the original whahler one. Next job is intercooler off & clean but I can’t see why it should be restricted. Any ideas would be most appreciated as I’m now developing a bald spot.lol. Thanks in advance.

 

[rolandbrindley]

Purely because the last component touched by human hand was the throttle valve, my money is on that for the smoke and low turbo function. If you can refit the original, why not try it? Or look for another like the original?

 

[Powerfull pierre]

Lol I binned it as it was faulty. I might have a word with a Fiat dealer & see if they can reset adaptation. My Bosch system won’t let me. Worth a try.