Symptoms:

--Sometimes revs drop if I accelerate normally, especially when its not fully warmed up, so I have to manually shift down to accelerate. My other option is to accelerate very gently. Its as if the car is afraid to accelerate so I have to sneak up on it. Restarting will cure this problem for a while.
--Sometimes the car jerks when going uphill with cruise on.
--Check engine light came on once, went away.
--Under acceleration it sometimes feels like there is no power, other times like there's a full 350hp.
--Today I backed out of a parking space and it felt like there was no power at all. Problem sort of resolved itself after a while.