situation: i have a 1992 civic vx. 165,000 miles. stock motor. so my car bogs every once in a while. i will be driving and it will just stop accellerating. kinda like du du du vrooooom. it stutters then picks right up. it doesn't do it a lot, but maybe once every 4 or 5 minutes. it's really annoying. what i tried to do: so i tried replacing the fuel filter, plugs and all the tune up stuff. didn't work. and when i pulled the plugs out, there was oil on the plugs and wires of the two center plugs. what is the deal?