Automotive Forums

Major problem guys. I'm driving down the interstate one night going about 60-70 and all of a sudden the speedometer drops down to 50. I give it gas a couple of time but nothing finally I pull over onto the shoulder and by the time I do that the car just cuts off. There were no warning lights, no bells no whistles and no smoke. a shop did all their "diagnostic test" on it and all they could tell me is the engine is locked up and would either have to get it "rebuilt" or buy a new one....Does ANYONE know what in the world happened to my car.