Sorry to read of your issues Adam. Thought to relate a little story relative to my first motor car, having spent quite a few years as a motorcyclist in my yoof, rebuilding their usually well worn engines... Same thing with my first car being a 1959 Frogeye Sprite. All back in the day when engines were so much simpler..... I was a little disappointed with the performance of the Sprite, and after a week of running it in, I pulled the sparkplugs to find the plug in No1 cylinder had never ever fired...!!! These ware new out of the box Champion plugs as part of the rebuild.. I dug out one of the old plugs that had come with the car, and boy was I pleased with the increase in performance....(-: I had even tuned the engine running on three to tick over at circa 750RPM.... My excuse is that I was more used to listening to rather loud single or twin m/cycle engines, thus did not detect the missing pot...! (-:
Hope a replacement plug solves your issue Adam, but might have thought any such seemingly obvious fault would have been picked up by the OBD gizmology..?
Looking forward to reading you have resolved your issue.
