In addition to what Eric said, I suggest you check your fuel pump. When did you change your spark plugs?
You have to check the pressure of the fuel reaching the engine by installing a pressure gauge at the end line of the fuel injectors rackThanks for the advice! I don't think they've ever been changed. What in particular do you look for when inspecting a fuel pump? I called my service advisor and told him about the incident and he has yet to call me back.