My wifes car is on the blink. She was driving home and said when she comes to a stop, it starts rumbling and almost shuts off. It runs fine as long as she is going down the road. So when she gets home, I go crank the car up, it idles fine in park, when I put it in gear, the same thing, it starts to almost choke down, and wants to shut off. I put it back in park and its fine. Anyone have this problem before?