Technical Misfire

[Dogit]

Hello. My ducato mk3 2012 2.0 started to misfire and have black smoke in 2700rpm only. When pass or before that rpm everything is going well. I changed the injectors but same problem occurs. I don’t have any faults stored and no engine light on. Any thoughts or someone with similar problem??

 

[bugsymike]

Hello. My ducato mk3 2012 2.0 started to misfire and have black smoke in 2700rpm only. When pass or before that rpm everything is going well. I changed the injectors but same problem occurs. I don’t have any faults stored and no engine light on. Any thoughts or someone with similar problem??

To me black smoke may indicate a loss of turbo boost , so maybe not enough air rather than too much fuel.
So it may be worth checking for anything on inlet side leaking.
A live data test may indicate lower boost pressure at that point perhaps.

 

[Dogit]

To me black smoke may indicate a loss of turbo boost , so maybe not enough air rather than too much fuel.
So it may be worth checking for anything on inlet side leaking.
A live data test may indicate lower boost pressure at that point perhaps.

We took off the turbo charger and it was very clean with no damage at all. It cuts on specific rpm and only then it has the black smoke. I will check with live data though

 

[bugsymike]

We took off the turbo charger and it was very clean with no damage at all. It cuts on specific rpm and only then it has the black smoke. I will check with live data though

It's not just the turbo it's self it can be a leak at a hose clip, hose split, intercooler leaking /cracked etc.
I had one that I used blanks and 20psi pressure to test for leaks and found hoses not sealing, but also things like a "smoke test" can show up other issues, I had a 1.6 Doblo that black smoked due to a small gasket on EGR to inlet manifold joint at back of engine.
I suppose a dead spot on throttle pedal may effect it but would expect to see that on live data when testing pedal position etc.