@DrMaryStone , i think it's just a by product of the tires/width. I'm running stock suspension but noticed tramlining after moving to the same tire specs as you (but with MPSS 4S). I tend to notice it more on warmer days and mainly on the interstate.
Yeah I tried to catch a video of both rpms and the front movement with an object for reference but by the time I got my phone to focus it subsided and rpms dropped to around normal idle. The best way to explain it is stand on the brake and apply throttle then let off. Hell if I know...maybe just...
Sorry for the lack of updates. I was able to reproduce the issue this past weekend. I backed it out of the garage for bath time and put it in Drive, while still on the brakes I felt the front lift so I went into Neutral and of course without load, the front dropped. I went back into Drive and of...
Maybe TC then as mentioned earlier? Sitting in line I got off brake for a second and it started again (even slid foot further left to ensure I wasn't riding the gas pedal). No codes reported, Bimmerlink shows battery at 88%. The good/bad news is it seems that I'm the only one with this oddity.
@lucky phil, OAT was around 70 degrees F. The experience was similar to what you stated but it would actually cycle meaning once it dropped, the front would raise again for a second or two and then drop/compress again. I tried to simulate it this morning by holding the brake and applying power...
Not necessarily an issue per se but today while sitting in line to leave work I noticed my front end would raise up and then lower. It did this a few times and stopped after I put the car into sport mode. I've noticed this before but thought I was imagining things. Anyone else experience this...