right, ive been playing about with my my car today and think ive cracked it. basically i think the fuel relay is fooked. its not reading the input signal from the coil to let it know its running. the reason it starts is because the black/yellow wire going to it gets the fuel pump going, but as soon as you stop cranking the black/yellow wire stops pulsing and the wire from the coil (back of tacho) takes over. on mine as soon as the black/yellow wire stops pulsing the fuel output to the fuel pump stops, which means the relay isnt reading the input from the coil (even though the input voltage is there as i tested it). so hopefully with a new relay it should be thumbs up.