Well at 3000 miles I got the dreaded CEL again. First time was at 1800 miles. I have noticed the rough idle several times over the last 1200 miles but since taking the car to the dealer is kind of a pain I would heel/toe at stop lights to keep idle up when the idle dipped which I think prevented the CEL from triggering.
This weekend driving back from Austin to Houston I decided to let the problem manifest itself and just let the car shake at 400 rpm at a stop light and voila.....CEL light came on with TC and cruise control light went from green to orange and was not functional. And at the exact same time the idle smoothed out at around 700 rpm. There was a definite loss of power on the top end but car was very driveable back to Houston.
The rough idle always seems to occur when I have been driving longer distances (like 200 miles to or from Austin to Houston) and then come to a stop light.
Went to the dealer this Saturday to get my free oil change at the Toyota express lube (thinking the service department was not open) and they told me my free oil changes had to be provided through the service department which was open till 3pm. When I pulled in line to the service department I found out they had been trying to contact me to come in and get my ECU reflashed (I had taken the car to the dealer the first time it occurred 3 weeks ago so my technician was already researching the issue since I was the first at this dealer with the rought idle issue).
Service department immediately told me that they were putting me in a rent car so that the field engineer could look at my car this week. No news yet but will post when I know more.
Loaner was a very nicely loaded Camry SE
but I do miss the FR-S
PS - I was told that a second customer had just come in the day before with the same CEL issue so now this dealer has two cases.