I have a 2016 full bolt ons but without a custom tune, I did two wot pulls from third gear over the weekend and after 4000rpm I felt three small lunges then it was fine, my car was at operating temperature and it also recorded three knocks in cylinder 4. I am not sure if it is not used to the colder air and the ecu needs to learn to adjust to it or not.
Wot not sure if it is timing retarding or something worse.
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