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    2008 MS3 running rich -25 Stft at idle

    I changed my turbo for another stock K04 about a month ago and everything went great, and had no codes for the first 500 miles. Now I have code p2188 and p2178 and my STFT is at -25 at idle and I'm getting terrible fuel economy. I originally had an issue with the car giving out at 4k rpms and...
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