If you have a Multimeter, you can check your plug wire resistance prior to paying for further diagnosis. If you don't own one, you can get one at Sears for pretty cheap. Simply pull each wire, one by one and stick one probe on one end and the other probe on the opposite end. It should read 2.2k ohms. I had 2 wires test out of spec. One was 2k ohms and the other was 8.5k ohms. I could have replaced the 8.5k one for $40 on fastlane, but I wound up buying the full set for $190.

I was able to get my hands around the metal connectors of the wires pretty easily after popping the top plastic engine cover off. It simply pops straight up and off. Be sure to give the ones connected to the coils a little twist prior to pulling them off.

Replacing all the wires took me about 15 minutes and that was including measuring the resistance of each.

The plugs are good to about 100k miles.