ok well this has been happening for a couple months, but by my back left tire in front of it, when my car has been ideling for a while you hear this clicking, well since i work at a car dealership one of the guys i work with put it up on a bay and said it was my fuel filter, a little cylinder with a whole bunch of wires going to it, you can feel it clicking at the top of it, or as he said pumping. what do you think the problem is?