I have a 2015 RS 1.0 AT and I have pretty bad RPM fluctuation (goes from 1000 to 400) in park. It seems to occur at the same time as my other issue, my car has really jerky upshifts, both in auto and manual modes. The upshifts seem cause the engine to hiccup, or pause for a split second. Both problems goes away if I restart the car, but seems to come back randomly. Would I be able to get a reflash on my 2015? Or is that only available to certain VINs, I assume early 2013 models.
I had a 2013 FR-S, also AT, that I drove 15k miles on and I never had the jerky upshifts nor RPM fluctuations. My 2015 RS 1.0 I started noticing these issues past the 1000 break in period (which is when I started to push the car harder).
No defroster, AC or anything was on for that video btw.