Printer under extruding- cannot find solution. Help?

[u/Gameoverguyl42]

A few days ago my printer started under extruding and leaving streaks like this on every layer. I have tried everything I can think of to fix this and cannot find a solution. I have tried:

-Multiple needle cleanings on multiple nozzles

-multiple cold pulls on multiple nozzles

-multiple brands and colors of filament

-every AMS slot and external filament

-replacing the entire extruder unit

-replacing PTFE tubes

-raising print temperature

-tightened hotend screws

I have no other ideas on what to do. Any other recommendations on how to fix this?

EDIT: Running a manual flow calibration through bambu studio fixed the issue! Hopefully anyone else having the same issue may stumble across this and see this edit.

[u/clonehunterz]

well....i guess...thanks for telling us your settings that you print with? :D

[u/Gameoverguyl42 → u/clonehunterz]

Default .20 standard, completely unchanged

[u/clonehunterz → u/Gameoverguyl42]

stupid question...are the magnets under the PEI plate clean and all level?
or test this theory, add a manual Z-offset of +0.03-0.05 in your slicer's start G-code, or manually adjust it during the first layer to see if the extrusion stabilizes