The past couple of weeks I've been getting a drop in rpm when my car is at idle (at stop light or in my driveway). It drops from about 800 to about 600, then goes right back up. It's completly random, and only seems to happen when the car is warm. The car is an 03 v6 atx. I recently added an MAFci, not that that is the culprit, but its the only change i've made to the intake side of the engine. Anybody else experience this? I really hope its not a bad TB.