Hello. I have a 2007 Versa hatchback with 262000 miles on it. I drive back and forth to work everyday 25 miles on the highway. Yesterday, as I got off the highway and came to a stop light, I noticed a low rumbling noise, almost like an exhaust pipe with a hole in it, but it was coming from the engine. When the light turned green and I accelerated, it seemed sluggish and loud, but at 40 miles an hour, the noise stopped and the car ran smooth. I drove home and had no problems with speed there or back. Only at stop lights, it rumbles and you can feel it in the pedals. It doesn't do it in reverse, neutral or park, however. Anyone ever heard of anything like this? Is it a bad cylinder? Transmission seems to be working fine, also.