My car won't start. When I turn the key everything goes as normal, the car sounds like it's going to start, but it doesn't. I took it to Sears auto shop, and they can not find the problem. The lights and everything works. It sounds like it going to start, but it just does not turn over. I don't smell gas, they checked my spark plugs, wires, battery. The starter, and timing belt is new. What else could it be?