I have a 97 tracer 2.0 liter, 4 cylinder engine.103,000 miles, Spark plugs, wires, air filter is new, battery still strong, 3/4 tank of gas, but it just wont start. Its turning over like its going to start, but its just doesnt happen. no sign of any leaks anywhere, lights dont dim down when attempting to start. What could it be?