s8 idle

[GLDN6]

hey I'm just trying to set the idle.
I have completely set my idle in openloop so that runs well.
after switching to closed loop I noticed that I need 2% in the open loop and 3.5% in the close loop
(at 90 degrees engine temperature)

how can that be?

I set all correction values ​​to zero in the closed loop so that nothing is affected.
Theoretically, it's easy to set the idle. but that confuses me a bit.

do you have tricks to set idle?

greeting