Out of the blue, I had a fuse blow on my trip from Los Angeles to Chicago last week. It was the first time the fuse has blown and it has happened two times more since I've gotten home. It seems to go at slow speed or under acceleration. Also, I'm getting a service engine soon light coming on intermittantly. I had somebody read the code and told me that it was a "engine speed" problem. They used a Snap-On reader. Any ideas?