SlverBrute,
I am having almost the exact same issues with my '06 with 44,000 milies on it. Same sputtering, feels like it has a dirty fuel filter, etc. I changed my fuel filter, but the problem persisted. I had a chance to briefly correspond with Bill about it, and he told me to leave it stock until he could dig into it. I will be talking to him when he returns after Feb 24. I would guess he is working on yours as well.
Good luck! I know if you are like me, you can't wait to get that snappy response back by using the custom tunes on the Gryphon!
