Audi 100 2.5 TDI, engine code ABP, issues after chip tuning

'The following concerns a specific case.' Bosch 0281001092.

I've been trying it out all day. 'Even after the engine has warmed up, the power delivery is still erratic, with strange, brief 'stuttering' or 'power dips' occurring between 2500 and 3500 RPM.'
They only occur when accelerating fully, and they last only milliseconds.
There is absolutely nothing in the error log.

Has anyone here experienced something similar?

I was wondering if this could be coming from the RSW Poti. It swings out further with a higher fuel quantity and appears in the area where coal residue accumulates. And that's why there's a potential for poor contact with the slide and the carbon layer.

I'm also seeing a value for 'KF' in the MotorFile starting at address $0781F. I suspect it's a fuel quantity limitation, but my car doesn't have an air mass sensor (and I can't find it mechanically either). Could it be related to boost pressure?
Could someone guide me in the right direction?

I can provide you with Eprom files. Send a PM.

I am grateful for any input!

Could you please send me the files (both the original and the tuned versions)? I'll take a look and see if I notice anything.

Have you covered everything about pump voltage?

Best regards,
Andi.

I've tried various things, for example, just adjusting the pump voltage and boost pressure.
With the same result. It seems like something is happening with larger quantities.

Files per PN