I know lots has been posted about his but I cant find any rhyme or reason to this problem im having, the air bleed valve has been replaced as has the fuel filter, pump ok, sometimes the car just starts and dies straight away, then I have to run the pump cycle 2/3 times before it will fire up, sometimes fires up first turn of the key, left it for 2 days, wouldn't start, left it for 2 days started first time, runs perfect when running, no fuel leaks, hot or cold makes no difference, runs fine all day, starting ok, then back to square one, wont start, bleed again and away we go, any ideas would be helpful, thank you.