I had this same problem on mine (same year and model) with 76K. I pulled the caps and rotors and they were in horrible shape. I figured they would get water in there, causing them to go bad at an early age. By the way, I live in a very humid climate. Anyways, I changed plugs, wires, caps, rotors, fuel filter and now the car runs FLAWLESS, seems alot quicker, especially when you stomp on the gas! The tune up is pricey, but hey, figure 1 tune up every 100K isn't that bad! Not many cars cand do this!!!!