Incident date: 12/05/2011, 5:45pm weather/road condition: Good, no rain/snow, normal traffic pattern summary: Accord 2012 LX had a sudden engine rev for about a couple of seconds and went back to normal without driver intervention. Minor gas pedal vibration noticed for first 500 miles during break-in. Details: I was driving Accord 2012 LX on a local main street at about 20 to 25 mph, entering a normal small slope. I suddenly heard louder engine noise, and noticed tachometer going up from below 2K to 3K RPM quickly. At the same time, I felt gas pedal was moving away from my right foot. Eventually the gas pedal came back and tachometer reading went back to normal as well. This lasted for a couple of seconds. I did not move my right foot away from gas pedal and did not intervene while this was happening. Since this sudden engine rev went away in a couple of seconds by itself, I didn't feel that the Accord accelerated a lot during the period. During first 500 miles on the Accord, I also felt minor gas pedal vibration frequently on roads that are not perfectly paved and have some minor bumps. I have never noticed any such gas pedal vibration on other cars when driving down on the same roads. The vibration became less pronounced after 500 miles, and I didn't notice it lately. I am not sure if there is any relationship between initial gas pedal vibration during break-in and recent engine rev incident. I am concerned about highway safety of the car.

- Basking Ridge, NJ, USA