I have an 07 Honda Element SC. When I accelerate slowly from a stop the car seems to start bucking until I give it a lot of gas. This doesn't happen if I start off pressing the gas hard. Just trying to save on gas and don't think this should be happening. Bought the car used and was told by dealership when I took it in for service that there was carbon build up and the previous owner probably put cheap gas in the vehicle. Could this be causing the problem? Transmission? Fuel line issue? any ideas?