hi tony66 thank for reply do you mean crack off leak off pipes when warm to check for fuel being returned ? I will try today is there a electric cut off switch on theses that might not be returning to run ? can you say what I would need to do to re code injectors and pump or would putting my old injectors in that should be compatable with my ecu do it ? had good check round for air / fuel leaks couldn't find any many thanks ek54