The subject may not accurately describe what's happening, but when she's idling (cold or warm engine) I notice a little lump to the idle. It's not violent nor does it shake the car or anything like that, I can just barely feel it in the shifter and in the seat (my butt). Car drives just fine, VTEC works fine, no hesistation. This has been happening since the day I got it. Is this a normal characteristic for the F20C1?