im having yet another problem with my dohc zc it has a vacum advance distributer and just out of the blue yesterday night i went to fire it up and it was surging at idle and if you hold it at a constant rpm it will start spittin and spudderin, does this sound like a distributer cap/rotor problem or something more serious, i pulled off some plug wires and there were a couple when i pulled off the engine noise didnt change.