I'm also wondering if you got your problem taken care of?

 

yes, i ended up having a bad spark plug wire on one of them. my dad took it to his work and had a tech hook up his diagnostic tool to it and it was showing heavy misfires on one of the cylinders, more than any other by alot. I noticed one of my spark plug wires had some corrosion where it connects to the spark plug, but only that 1 wire, the rest were clean. so anyways, new spark plugs, new wires, hesitation/misfire etc all gone.