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I agree you need to supply the DME with as much accurate info as possible. Moving the IAT to a post boost area definitely makes sense. It can’t hurt... that’s for sure!
Also just thinking about what Hass posted... he said the N52 MAP sensor tops put around 1.2 bar. That’s 17.4psi. If you are running 6lbs of boost then you are around 21psi (1atm at sea level is about 15psi). I don’t see how running a MAP sensor which can’t read correctly can help.
Maybe the MAP sensor needs to be swapped for a N54 one and the ecu somehow calibrated for it?
I doubt it’s the O2 sensors. If they were working fine before the SC I don’t see why they would go bad so quickly. But then again, at this point maybe spend a few hundred and change them.
Once you can verify the DME is getting correct info from all sources (IAT is accurate, MAP reporting accurately, O2 are good) then the only thing left is tuning, right?
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