diagnose this plug pic

[juiceman]

ok then, generally a fouled plug in only 1 cyl. is an idication of either a weak spark, or a weak cyl. its obviously getting the fuel but its not burning it. of course there is the posability that you are not getting as much air flow to the 5 cyl, but i assume you have a good intake and your valves are adj properly. if it were an o2 sensor prob. where the comp was in open loop operation then it would affect the whole motor not just 1 cyl. i honestly wouldnt worry much about it as it seems the car is running fine. youre not gonna get a perfectly balanced cyl motor from the factory.