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was it conclusive that the FMIC fixed the 2C57 or did it come back at any point between the fmic install and changing to a tune instead? Getting the same issue
The larger intercooler didn't cause any issues, it problem was the NM power module. From what I understand, the JB+ and the NM make power by spoofing the MAF so that the DME thinks that it is at a higher altitude. I would recommend ditching the NM dongle and getting a flash tune.
