Zafira B 1.7dtr, ECU problem/MAF

Hey, I bought this Zafira almost a year ago and can't seem to figure it out. Please help me if you can.

Symptoms: a lot of black smoke and no power.
Now I just got a second hand ECU and cloned it. It did improve it but my MAF still fluctuates a lot.

Did you encounter something like this?

I just recorded the live data.
Here it is: https://imgur.com/gallery/S1Be8He
https://imgur.com/gallery/S1Be8He
Now I have cut the wires that are responsible for MAF reading right before MAF and twisted them together. And unfortunately I get the same reading on live data. By doing this it should have been stable.

I did check with multiple diagnostic tools.
ECU is Denso mb2758009922

Hey, I bought this Zafira almost a year ago and can't seem to figure it out. Please help me if you can.

Symptoms: a lot of black smoke and no power.
Now I just got a second hand ECU and cloned it. It did improve it but my MAF still fluctuates a lot.

Did you encounter something like this?

I just recorded the live data.
Here it is: https://imgur.com/gallery/S1Be8He
https://imgur.com/gallery/S1Be8He
Now I have cut the wires that are responsible for MAF reading right before MAF and twisted them together. And unfortunately I get the same reading on live data. By doing this it should have been stable.

I did check with multiple diagnostic tools.
ECU is Denso mb2758009922

Better firstly search for air leak from MAF to intake manifold

Hey, I bought this Zafira almost a year ago and can't seem to figure it out. Please help me if you can.

Symptoms: a lot of black smoke and no power.
Now I just got a second hand ECU and cloned it. It did improve it but my MAF still fluctuates a lot.

Did you encounter something like this?

I just recorded the live data.
Here it is: https://imgur.com/gallery/S1Be8He
https://imgur.com/gallery/S1Be8He
Now I have cut the wires that are responsible for MAF reading right before MAF and twisted them together. And unfortunately I get the same reading on live data. By doing this it should have been stable.

I did check with multiple diagnostic tools.
ECU is Denso mb2758009922

Better firstly search for air leak from MAF to intake manifold

Unfortunately we checked for boost leak, vacuum leaks, checked filter, catalyst, EGR, EGR cooler. The dpf has a few holes through it, but I don't believe it's the cause.

You can see on live data that the reading it's really erradic. Goes to 0 as well. As it doesn't have an O2 sensor I believe it uses the MAF to figure out how much diesel to inject. Because I also have an average of 14l/100km