It sounds like you have the classic fuel pump issues descibed in this and other bucking threads. Do you have a warranty still? If so I'd be inclined to go into the dealership and encourage them to by pass all the testing they will want to do and find a way to charge you for and set them straight off to the fuel pump. If not and you or your dad or someone else are so mechanically inclined there is a write up on here how to fix the problem yourself. Hope that helps.
