Well, no wonder it's not running up to snuff... someone left rags stuffed in the intakes!
I look forward to your progress and findings. I've done next to nothing with mine to date aside from regular oil changes and a set of plugs and wires. The occasional dealer mandated fuel injector flush/cleaning, but not much else.
I've got nearly 70k on this thing now and wonder about what I should be looking for on mine before the warranty runs out. (100k , 7 year Extended Warranty... in case you were wondering)
Cheers!