I have a 2000 Mazda 626 and it randomly does not start. Sometimes I try to start the car and when I turn the ignition, there is no sound. The battery is brand new and so are the spark plugs. This happend a couple times. The first time I just tried again about 15 minutes later and it started up. The next time I was playing with battery terminal wires and it started. The third time I tried to move the battery terminals but that did not work so I put the car in neutral and moved it front and back and it started. Why is this happening?