Hi Michael,
Sounds like yellowing from too much rain. Generally perennial vines are not fertilized as that will cause leaf growth at the expense of flowers. Your honeysuckle sounds like the invasive Japanese honeysuckle. If it's fragrant, then it is the invasive type. I would recommend you replace it with a native such as Lonicera sempervirens. It will bloom on and off from May to hard frost and not be invasive in the environment.
http://www.wildflower.org/plants/res...?id_plant=lose Newt