Switch back to the .4 nozzle the min layer height with abs should be 0.16 it likes to be in the 0.20 to 0.28 range.
- I print with ASA
- My Bed @ 105c I use the WhamBam and vision minor adhesive.
- My nozzle @ 275c you can try the 260 to 270c Bambu setting with your BL abs
- Your flow ratio recalibrate you should be lower
- Set your volumetric speed @ 14 start low you can always go up to 22
- Retraction settings will need to be tuned also
Wash your bed plate with warm water and dish soap, give it a light rub with a scotch brite pad then add your adhesive.
Do the calibrations and then test some small parts out.
I would also recommend the orca slicer if you are not using it.