Hi everyone, im currently experiencing a very strange issue with my 2020 330i. I am currently running a stage 2 map from MG Flasher, but also do have a custom 93 tune from jordantuned, and currently have these mods on my vehicle:
Catless DP with alibaba valved exhaust and magnaflow resonator.
MST intake with inlet pipe and heatshield.
FTP chargepipe.
xHP Stage 2.
BMS Oil catch can.
and recently while WOT, my car starts to pop during pulls. not like when you let off and it burbles, but during the pull it pops and slightly shudders per pop too. According to bimmerlink my IAT's are normal, Coolant temps are normal, Oil temp is normal, the only very concerning measurement is the specific measurement "IAT's before throttle valve, measured" I have seen this number spike up all the way to 133C. Which im very sure is an insanely bad number. the pops occur in all modes, yet fluctuate in how bad it occurs without any seemingly obvious signs. for example, during the 90F heat my car was struggling a lot, and was also struggling in 58 degree temps. But in 66 degree temps it seemed to almost completely go away. I had taken it to bmw where they discovered my oil filter housing had an active coolant leak, and replaced that along with my heat management system, but the issue hasnt gone away. The tech claimed it was due to the tune, and after flashing it from a custom 93 tune to MG's stage 2 map it seemed to get better. however that was only temporary and then went back to being just as bad. I sent logs of the issue to claude to have it break it down for me and it has gone through claims of things like carbon build up to a faulty or dirty TMAP sensor to a weak heat exchanger or even a loose coupler on the chargepipe. Does anybody know any reasoning to why this could be happening? thinking about taking it to a performance shop soon but would like to see if anybody here had any ideas. I have attached a video where you can hear the pops while doing a pull.