2014 BMW 535i xdrive LOSS OF POWER AT LOW RPM

[ssgm1x]

Hi everyone !!!! I have a 2014 BMW 535i xdrive. I have noticed a loss of power at low rpm and i cannot figure out what it is. Car has a OBD ECU Flash Stage One. Have had ECU Flashed now for a few months with no problem. The other day i punched it a few times and it felt great but later on that day the car seems to have lost 35% of its power only at low RPM. I dont know if its the fuel pump or a Boost Leak. Car did stumble once at Dunkin Donuts parking lot pulling out of a parking space. It stumbled only for a second. I am also getting rough idle when i start car for the first time almost every day (when car has been sitting overnight).
Any insight into this matter would be GREATLY appreciated. I have no Check engine lights. I did run the CARLY DIAGNOSTICS and had a few codes. Here are the codes....LDM function High Level erroneous.....Central Memory Full.....Flexible Bus interface unknown DTC fault.
I have no idea what these mean? anybody???

[Stück]

Your description could be a dozen issues known to occur on N55 vehicles. Bring the car to a reputable shop and let them make the determination as to what is needed to alleviate the symptoms you have. Take the Carly device and throw it in the trash, its a kids toy and these cars need a legitimate diagnostic suite (Like BMW ISTA) to diagnose and work with reliably.