[mxtchesmxlone]

I have a BMW 320I N20 engine. So my fuel trims both short term and long term go down to -30.5 after driving the car for a while. I've replaced the O2 sensor, and MAF and no changes. Before changing the MAF I kept cleaning the MAF and the car would drive fine without negative fuel trims but they'd come back after a few days so replaced the MAF and the issue is still there. The clutch also appears to be slipping but not 100% sure. Whenever I put my foot down the cars RPM's stutter up and down before it actually puts any power down properly. Any ideas? Thank you