AJM Motor Performance Loss and Stalling

Hello
I have two problems with my 115PS engine:
First, I experience occasional malfunctions under load, similar to a gasoline engine experiencing misfires.
Secondly, I experience a power loss at 3000 RPM, and the engine is reluctant to rev up to the red zone. Whether the engine still has full power at low speeds can only be determined by feeling.
I had the fault memory read out and the power supply relay replaced, but both did not resolve the issue.
I read somewhere about fuel filters (3 x f is this correct now after the new spelling reform?) from ATU, which cause a power loss of 3000 U/min.

Thank you for your help.
Lift

Hello,

In PD engines, there may be issues with fuel supply in the area of
The auxiliary pump (vacuum and fuel pump) is coming.

Please check the error database under "PD-Ruckeln" (PD-Ruckeln).