For the past 12 months I've been fouling plugs. Sometimes two in two weeks, sometimes two in two months. Intermittent which I finally traced to the secondary ignition coil on my '02 WR426. Instead of 9.5 - 14.3 k - ohms i was getting 22 at the plug cap. Testing the coil with the plug cap off (just the end of the wire on the lead) it read 11 k - ohms, which was in range. The resistor inside the cap gave a 10 k - ohm reading, which appears to be the problem. However, i've just fitted a new cap (which has 5 k-ohm resistance) and i'm still getting a high reading, although it's only slightly higher 17 k-ohms from coil to cap. I know this is higher than the manual specifies, but would it hurt anything? Could running a dodgy cap for so long have hurt the coil and caused to give a higher resistance reading?