I certainly wouldn't disconnect a plug HT coil pack with the engine running - especially one that's bolted onto the cylinder head and me on my back under it.
Maybe on an older car where you can short out the plug lead with a screwdriver to determine which plug wasn't firing correctly, but on a flat 6 engine with 25,000 volts, I don't think so....
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2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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