is what is happening to your car similar to this?
http://www.youtube.com/watch?v=E4kUJIlGPk4 it happens the most at :30
because this is what my car is doing...and i'm curious to why, It even sets off the SES light...but then the light goes off after a while of just driving. When i take off from stops it surges as well...but it is always off and on, not a constant problem...