Mine does exactly the same, and was wondering this as well! It also does it after a journey when i park up on the drive, it hovers at 1000 revs and goes up to 1500 and then sometimes dips to below 1000?Hi just wondering how i will no if my ST has had the update for the ecu? How do i check it? When i start it it revs up to 1500 then back to 1000 os this normal? Also what is the whole update about, was there something wrong with ecu?