[WhatsADSM]

Not sure where to post this as there isn't an ECU/Tune specific area.

I just recently purchased a used 2011 E90 DCT with ~55k miles on it. I finally had a chance to move my Bluetooth logger over to it and noticed something very odd right off the bat.

At idle the car was running nearly -30% LTFT! Under a light cruise at say 40 mph then would sit around -18%. While accelerating mildly they would go to around zero. Seemed like the less load (more vacuum) the worse the LTFT would be. The more load (closer to no vacuum) the LTFT would return to normalcy around 0%.

The short term fuel trims were around zero the whole time suggesting the LTFT were really that wacked out.

This normal for an S65 M3? Seems really crazy to me, most OEMs would never let a tune out the door like that. I do some dyno tuning on the side and I would also be ashamed if one of my tunes was relying that heavily on long term trims to dial things in.