Could also be the Throttle Position Sensor. Mine would get a second or two of deceleration at 60 mph. I replaced the TPS and I'm all good to go now.
dang, did it continually do it say every 10 miles or so ? see it could be all kind of sensors, but thats what mine has been doing fo over a year a second or two of deceleration at 60 mph, i,m confused, i,ll google tps now, thanks