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Before your next track day, it might be wise to go to a dealership service center and ensure you have software update "ZA1JA01C". While this hasn't been confirmed by Toyota, there seems to be a fair amount of evidence to say this reflash contains the fix to the DI collar/detonation problems that some owners have been experiencing.
I have an appt Sat morning for a free service and a software check.
I'll be willing to put my FR-S out on track again after ensuring I have this update!
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