Mine was to where it was running good then all of a sudden, it would start spit and spuddering, just about to die. I ran it like that for 3 or 4 days, then it started dying. Took it to a local garage and they did a full tune-up and that fixed the problem for a few days. Then it started doing it again. Took it back and they said that the new plug wire were bad and replaced them.
Haven't had a problem from it for about 6 months now. hope this helps,