it sounds like it could be a rectifiation problem check out the ignighter lead even though it sparks i have had one of these problems and the lead was open circuit insde the lead the spark can jump a gap in the lead but does not recognize continuity as needed for rectification,
might be worth a try to test the wire with a continuity meter
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!