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I bought a 2015 Scion FR-S a few months ago, it has 32,000 miles and recently started RPM hunting (maybe a month ago) and then the check engine and slip lights began to turn on last week (currently codes: P000A and P2757, though they seem to change frequently after I clear them). I plan to take it in and see if an ECU flash will make any difference, however my car has a MapPerformance Turbo and E-85 tune. Will the ECU flash mess up my tune? Any suggestions on things to try before an ECU flash?
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