m54b25 low rpm stutter
since about 3 days ago my e39 started to stumble at low rpm, whenever i go past 1/4 throttle between 1400-1900 rpm there is very noticeable jerking. A few days earlier i did the vcg and sparkplugs and noticed higher carbon deposits and unburnt gas on two plugs. I also did the intake boots today in hopes of getting rid of a CEL caused by bank 1 and 2 fuel trim codes(smoke test revealed holes). This evening i took the car for a spin (1 heat cycle, about 50km), i did not delete the codes nor the adaptatioms yet since i dont have an obs scanner readily available. Unfortunately the jerking is still present. Should i wait for the ecu to readapt or should i immidiately replace the coils? The last time i read codes was before the issue was there, and there were no misfire codes. When the rpms go past 2k there are no misfires even under maximal load. Where do i take it from here? Disa seems to be operating correctly.