I just bought this as some of you know. When i bought it they told me the nylon bushings on the shifter cable were worn, causing the cable to rattle. But I'm not sure if that has anything to do with what I'm experiencing right now or not. This issue is when I'm cruising down the highway, anywhere around 65-70 (mind you this happens at all speeds, i can just feel it better around there), it feels like the motor is going along normally, then for just a second, it looses power slightly, but then comes right back. And it does this consistently. Now, I've never driven a car with Variable cam timing, so I'm not sure if what I'm experiencing is just the cam advancing and retarding. it only seems to do it at about 3000-3500 RPM's and above. Any idea as to what this could be? or is it normal? I'd like to take it to the dealership with some kind of idea of what's wrong, so I know if it should be covered under warrentee or not. Thanks.