There are software updates for the 2.0L engine (not very recent ones). I'm not aware of any for the 2.4 yet.
i heard people having problems with that.... MOTOR mounts will help it A LOT from feeling like it falls on its face... and its electric throttle... so u need a ecu to adjust that to be perfect... Its ur throttle response dont cheap out with this do it urself techniqueHave you guys missed the threads about the do it yourself throttle adjustment to get rid of the dead spot?