i have a 1998 dodge neon 2.0 sohc and when i try to start the engine it just cranks and wont turn over. i changed the spark plugs, spark plug wires, coil pack, valve cover gasket, and the starter. after i changed all of that it started and ran for about 3 days and it did the same thing. when i took the plugs out after i tried cranking it and it did not start the plugs smelled like gas. i was wondering if i get new plugs would that solve the problem or is it the crankshaft sensor or maybe the timing belt. i am at a stand still. thanks