Stumbling during low RPM acceleration, but not all the time. Its been going on for about 3 months but not enough to really grab my attention. Doesn't matter what gear I'm in....if the RPM's are low then it studders and hesitates untill I get going faster. Once I get to a higher rpm it accelerates normally and smooth.

The thing that really gets me is that it is not all of the time. Sometimes it is in the morning, sometimes at night, sometimes both, sometimes never, sometimes cold, and sometimes hot.

When it happens it feels like a miss-fire or a dead cylinder if that helps.

Thanks