I swapped the coil packs over, cleared the code, and it came back with the same code (misfire in cylinder 3). So it looks like I need to check the plug.
Has anyone got any tips for how to get the plugs out? They're in such an awkward place with no line of sight and very cramped access. I've got a standard plug spanner with a universal joint in the handle and a T-bar on the end, but couldn't tell if it was locating on the plug. Is there anything special about the plug type?
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JDM twinscroll Legacy wagon [previously blob WRX/PPP wagon, killed @ Silverstone Feb 2019]
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