Razzing down a dual carriageway yesterday and started getting the dreaded misfire under high boost in 4th,5th and 6th. *****!! Got home and pulled the coil pack cover off for a look to find a part number for a replacement coil. Thought I'd check the plug colour to see if any were different and stood out as the misfiring cylinder. 1-4 were fine but when I went to loosen 5 it was already loose, unscrewed it by hand and it was much cleaner/whiter (is that a word?) than the others. Put all the plugs back in and swapped 1 and 5 just to confirm it wasn't a faulty plug. Torqued them all up and went for spin, no more misfire. 
I think I'll be checking my plugs on a more regular basis, just to make sure they are not loosening off. If I had left it for any length of time it would have blown out for sure and been a much more expensive outcome.
Also tried a K&N cone filter, what a racket.
Standard air box going back in today. If anything it felt slower, and I'd done all the heat shielding bit.
I'll stick to my K&N panel in the airbox.
Graeme.
I think I'll be checking my plugs on a more regular basis, just to make sure they are not loosening off. If I had left it for any length of time it would have blown out for sure and been a much more expensive outcome.
Also tried a K&N cone filter, what a racket.
Standard air box going back in today. If anything it felt slower, and I'd done all the heat shielding bit.I'll stick to my K&N panel in the airbox.
Graeme.
Now gone replaced with:
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