I have same problem. In gear or out of gear engine idles @ 900rpm when warm. You would think it would be slightly lower in gear. Also, When I shift from "in gear" to "out of gear", the engine surges to 1300 rpm and drops back down to 900. This means I have to pause a few seconds when doing from drive to reverse in order to let the rpm's settle back down. Anybody have any idea what is causing this surge?