fiesta rs turbo dont start it turn over thers a spark and the fuel pump is heard the car fires up for about 1 second ad the stops if you press the gas its doesnt want toknow but if you dont press it will fire for a 1 second .i have changed map sensor ecu ignition amp thers a good spark and thers fuel getting to the rail but not coming out of the regulator any sugestion on this probem thanks