[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

[WeAreVenom]

from what I’ve seen MAF is usually if it’s running lean, running rich it would probably be the fuel pressure sensor. Possibly even the high pressure fuel rail but the sensor is the cheaper place to start