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As long as the outer insulation skin of the coil packs have not been compromised by heat cracks or mechanical damage so letting moisture through into the electrical windings, there should not be any mileage / time degredation to the performance of the packs.
But once the outer insulation has been breached, moisture, salt + corrosion can cause the internal electrical windings to short down to ground, thus causing the common misfires on individual cylinders.
If you clean and inspect each coil every service (12 monthly) you can spot any cracks or damage to the outer skin and replace the coil before the insulation breakdown causes you to lose a cylinder.
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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.
Last edited by Steve Tinker; 07-27-2013 at 03:51 PM.
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