Already checked the schraeder valve & fuel is definately coming out, but never noticed colour. Garage has suggested that it may be immobiliser, i have checked by using spare key but symptoms stil exist. Car turns over no probs & starts as it should but cuts out a couple of secs after, seems to be just enough fuel to prime system as when i turn key again it will turn over but not start...Only when i turn key back & fully clockwise does it turn over & start for a few secs. When it cuts out it's immediate no spluttering or coughing always after a couple of secs.