Hello Everyone,
i have recently encountered a problem with my BMW 420i b48 MG1CS003 ZF8.
Running stage 1 remap.
I have installed: MST cold air intake, FTP charge pipe, 3.5' catless downpipe. All at the same time, car went into limp mode and CEL.
Went to tuner; disabled EGR and dust particle filter sensor. still shocky and stuttering. Tuner says it limps because overboosting, says can be because of the intake and/or chargepipe. They could not get the car running fluidly, have log files of their run. Im thinking next step would be smoke testing the boost pipes and intake. any other suggestions?
I am now back to stock mappings. Doesnt limp, still is a bit shocky on lower RPM's (misfire? knocking?)

Thanks!

log : https://www.autotuner-tool.com/nl/log/9bf3993837636752643eb1a628e06fa7131b3991e5d60bbbe5ca46d5dec10928