I had to hit my brakes fairly hard to come to a stop from about 30 mph. . . .never engaged anti-lock though. When I went to go again it was like it was in limp mode and would barely accelerate. It jerked a little then accelerated better. I slowed down for traffic and it did it again. I drove another mile with 2 stops and it continued. I parked it and finished off my work day. When I left work everything was back to normal and it went like a champ. Any ideas what happened?