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Powdery stuff in number one coil, just dust or corrosion? Get a torch deep down inside and check contacts In the end.
Clean up spark plug threads and contact with a tooth brush sized brass brush. They do get a certain amount of surface corrosion over the years but have to be very bad to cause no spark /misfire issues on a regular town car.
BrickMan
@Sparky
Took me ages to actually get around to checking the coil and plugs. Did it just now. Absolutely no corrosion as far as I can see. Popped it all back together and took it for a test drive - no issue. Mrs Sparky is vague about what the issue was, so I’ll take it for a longer drive this weekend (breakdown paperwork in hand) and see if it misbehaves. Weird, eh?
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