Lately I have been hearing what sounds like some sort of loud relay clicking, back by my rear passenger wheel, near my gas filler area maybe. Sounds like a " tic-toc...tic-toc...tic-toc. They are 2 different pitch clicks, like a relay or coil is opening and closing. I hear about 6 or seven clicks, while my car is idleing, and then it stops. I usually hear this when I have just started my car after sitting over night, or for a while. Doesn't do this every day, just once in a while. Anybody have any ideas? Im thinking maybe my fuel pump? It feels like it is coming from under the car near the wheel area. I can actually FEEL this when it happens as well as hear it, it seems. Car is running fine.