I had been running my ZEX wet kit for almost a month now with no problems. Well, today I took my wife to the doctor in another town about 80 miles away and while coming home I noticed that I have developed a significant skip. Now I still have in the stock plugs, so do you guys think that they finally fouled? The car still has good power, it's just that driving normally at a cruising speed with minimal throttle is when I feel the skip.(surging) I have 2 range colder copper core plugs in the trunk, but I was procrastinating the installation of them, as I am not eager to tackle the chore. I hope that this is all that is wrong............any input will be greatly appreciated!!