I have a 1998 Cadillac Deville that just yesterday would speed up on its own while driving on a rural road. I had to keep the breaks on intermittently to reach my destination. After about 1 hour it way time for the return trip home. NO problem untill the same time had passed it did it again. My breaks were smelling and I had to put it in neutral as I stopped. The engine raced and I cut the engine off and then put it in Park. Have any of you experienced anything like this? It was scarey! What should I do?