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Spark plug #6 - ceramic completely destroyed (twice)
Posted by Derek in Durham [Email] (more from Derek in Durham) on Sun, 2 Apr 2006 20:30:16
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Rough running, poor mileage, low power for past 1-2 weeks, so I began to change plugs this morning. Only got the front 3 done so far and worlds of difference. Plugs 2 and 4 were a bit sooty but not too bad. However, plug #6 was completely missing all ceramic insulation (see pic). What causes this? Should I be alarmed?
Another reason for concern: I had this EXACT same thing happen to plug #6 in Aug 2004. The plugs removed today were only 16K and 20 months old. They were the factory spec Bosch FR8LDC; the plugs before that were also FR8LDC. Any help appreciated.
Thanks, Derek / 1994 900 S V6 163,500mi
PS Replaced today with Bosch Platinum +2 4301. Figured why not after getting all worked up about the FR8LDC vs FLR8LDCU+ issue on Friday. (See my post from Friday.)
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