Ignition issues can be a real pain to both diagnose and deal with. Sure, generally speaking, having a faulty ignition coil is a better problem to have than a worn-out turbo or clogged DPF, but ...
Headers and spark plug wires rarely coexist in peace. Even with well-planned wire separators, one of those hot header tubes will eventually flambe the best of plug wires. The situation is aggravated ...