If a coil pack is "melting" or oozing, replace it immediately. It means that is it over heating internally and it will go bad very soon and in some cases catch fire. Most do not catch fire, however since you are using it in a non-intended way it may not have the over-heat protection and may catch fire. It could aslo be causing your engine problem.
Please please please do not take this warning lightly. I've seen it first hand and do not want your next thread to be "my car caught fire".