W211 facelift 2008 e220 juddering under acceleration with black smoke

[Remon Yousef]

Hi, my e class 2008 done 180k miles recently when I accelerate around 3k rpm to over take it start to judder feels like I am pressing the gas peddle on and off and it leaves a cloud of black smoke behind.
At normal speed it drives fine no problem only under harsh acceleration can someone put me on the right direction where to start.

Ps I had the car diagnose by delphie no error codes and no lights on the dash or limp mood.

 

[mattkh]

Is car diesel?
Is car an automatic?

 

[Remon Yousef]

E220 diesel auto

 

[CowleyStJames]

I'd have the injectors tested if no fault codes showing.

 

[mattkh]

Any service history on the car?
At that mileage, there is bound to be a lot of carbon buildup in the engine.

 

[Remon Yousef]

Unfortunately when I bought it there was no service history with it, one month ago I done full service, the injectors seals was leaking so I cut the seats and put new seals now no leaks from the injectors, also changed the thermostat so the engine reach 90 no problem.
Today I am planning to take the egr off to check it and give it a good clean!
I wish I can take the manifold off to clean it and check the flaps but it looks very complicated.

 

[Larkone]

Had that happen on my OM642 - it was the turbo actuator, just needed cleaning and greasing

 

[Remon Yousef]

Had that happen on my OM642 - it was the turbo actuator, just needed cleaning and greasing

Was your actuator manual or electronic one, when I looked i looked it up it looks like mine is electronic one.

 

[mersum1es]

It is electronic on OM642 too. I wouls suspect that too. Does it rev over 3000rpm? If so, it is not in limp and codes may not trigger.

 

[Larkone]

Yep electronic.

 

[Remon Yousef]

Little update, I spend a good 2 hours trying to remove the EGR but unfortunately it won't move, I just managed to move it right and left just slightly but that is it.
Any idea?

 

[mioba]

When the tanks empty fill with a premium fuel (BP ultimate) and shoot some redex type injector cleaner.

fuel filter recently replaced?

 

[Remon Yousef]

When the tanks empty fill with a premium fuel (BP ultimate) and shoot some redex type injector cleaner.

fuel filter recently replaced?

Yes fuel filter replaced a week a go Man filter

 

[CowleyStJames]

Unfortunately when I bought it there was no service history with it, one month ago I done full service, the injectors seals was leaking so I cut the seats and put new seals now no leaks from the injectors, also changed the thermostat so the engine reach 90 no problem.
Today I am planning to take the egr off to check it and give it a good clean!
I wish I can take the manifold off to clean it and check the flaps but it looks very complicated.

Should've flow tested the injectors whilst they were out