Yep, definitley a fuel problem, or an electronic problem causing a fuel problem. I'm thinking you've got a shot injector, the pressure after turning off the car that is in the lines is filling up and drowning a cylinder... try the old screwdriver to the ear trick on ur injectors and see if all of them appear to be working properly. and if that seems fine and you have an extra injector try swapping out each one with it...G/L