how is his possible???

[180ways2slide]

i never seen this b4. i am running a microtech ltx8s on my sr20det and trying to get the hang of this tunning thing, but how is it possible that the spark plugs foul out so easily. i am using ngk v power-9 and the car idles all day but if i manage to take it up the block it fouls the plugs on 1 pull. plugs are really black and dry not wet at all. has this happened to anyone where plugs fouled out within 2-3 days of purchasing them i kno i need a tune but after 2 days, 1 or 2 pulls up the block, plugs should of held up no matter how rich im running