I just experienced something that never has happened before. I was driving on the freeway and as soon as I hit 4000 rpm I lost most all power, almost the feeling of a governer kicking in. Also the last three weeks or so one of my cats has been rattling. But it hasn't made a sound for three days. Is it possible that something is blocking inside causing the power issue. in 1-3rd gears the car feels fine. Also there was a small amount of smoke from under the car, by the time I looked I could not tell where it was coming from.
Any ideas?

TIA

Phillip