I've been having this problem for a while now, and its starting to get annoying. I've changed parts that could have been the problem which for a while seemed to fix it, but now and then the problem returns. The car seems to surge up and down and the engine light flashes, and other times when going to a stop the car stalls. No codes are being thrown. Other times the car drives perfectly fine. I know it says with most intermittent problems it is usually a bad or maybe loose connection or wire but if any one knows which would be the most likely wires to check thoroughly would be appreciated

 

It could be that the fuel pump is failing. I would hook a fuel pressure gauge to the fuel rail and see if the pressure jumps.