I was driving today, and all of a sudden once I came to stop, at a redlight, all my battery bars disappeared and my idle revs jumped to 1500. Then, ione battery bar came blinked back on. When I went to accelerate, the revs climbed, but the car did not accelerate very well. I had to floor it to climb to an adequate speed in traffic, the car did not want. Also along with it, I lost three bars of fuel?? What happened. I went from six battery bars to none. IT was around 90 today, but I was driving the car all day. Any ideas?!?!