ESP Replacement: LM/Fuel Injector Issues?

Since I'm not entirely sure what kind of problem I'm having, please excuse me if I've ended up in the wrong section.
I replaced my 11mm ESP from an ALH engine in my AFN today with a 10mm one, because the old one was probably defective; it could no longer be adjusted for injection timing, after 450 km since being purchased as new here from this forum .
"With the new fuel pump, the car starts well, and there's no black smoke except during significant load changes. The idle speed control now has a total tolerance of 0.3 (engine is new)."
However, I'm experiencing a problem where the engine seems to be running in a limp mode; approximately a maximum of 15mg of fuel is being injected per revolution, and the maximum RPM is 3,000.
The air mass readings are also completely off; when I accelerate, they drop from 385 mg/stroke to just under 210 at 850 target. It's hard for me to believe that the air mass sensor has suddenly and completely failed. Since I tested the system several times during assembly with some connectors partially disconnected, resulting in error messages that I have since cleared, I suspect that the engine control unit (ECU) might still be in a limp mode despite the clear error memory. In that case, the poor air mass readings might just be a consequence of the insufficient fuel injection.

Is it fundamentally possible, and how can I reset the MSG?

Thank you. Please forgive any unintentional mistakes. Brainstorming is welcome.

P.S.: The diode test is coming up now, but I don't really believe in it.

Hi,

Just read the error memory. There will also be information about the limp-home mode.

The air mass is far too low. Did someone forget a cleaning cloth in the engine?

Best regards, Rainer.

The error memory remained empty after being cleared.
"The cleaning cloth incident actually happened, but as I mentioned, the car has driven 450 km with the 11mm pump, and it had acceptable performance, as far as I was willing to tolerate during the initial break-in period. Nothing else was changed besides the pump replacement."

I suspect you forgot to pick up a cleaning cloth somewhere .

Rainer, are you making fun of me?

Do you really think that a simple cloth wouldn't affect anything at a speed of 140 km/h over a distance of 400 km, and that it would only cause problems when the ESP system is in a vulnerable position?
It would also surprise me if it shows a significantly higher air mass reading than the specified value when idling.

Okay, Rainer isn't messing with me.
I installed a diode, and now I'm getting excessive black smoke when I accelerate.
I then disconnected the charge air hose directly at the intake manifold, and afterwards, the engine responded much better to acceleration. I still can hardly believe I forgot a cloth again, so I'd like to know if a turbocharger can fundamentally be so defective that it restricts the airflow to such an extent? In principle, the resistance shouldn't be enough, even with a stationary impeller. And if it can, can this happen without any noise?
Thank you very much.