My car dies on the road yesterday, was working okthen when I went to go on a ramp i hit the gas and nothing happened. The fuel pump is pumping gas, the spark plugs though are not sparking, I changed the distruabtor rotor and that did not help, any other ideas? also the timimg chain did not break, there is a full tank of gas and I was just using it and starting it a few times that day within the hour it died.