Hi all, I ran out of oil and the boiler locked out. Since then I have bled the oil pump and now it no longer fizzes oil and air but just runs oil so I assume all is ok there. I have also unscrewed the bolt (point 2 in the image) and oil squirts from there when I click the unlock button so I also assume that oil is making it into the burner. I have also checked the photo cell (4 in the image) and that is perfectly clean. The odd (seems it to me anyway) thing is that when it tries to fire up I can see a bright spark at point 1 in the image (as a black tube enters the silver block) and smoke is emitted (not much and it smells electric rather than oil based). The boiler tries to fire up but a few seconds after I hear a click noise (the ignition?) it locks out again. I am at a loss at to why the boiler isn't firing up - the motor whirs like it used to but the 'whoosh' of the oil firing up no longer occurs. Any ideas? Any help appreciated!!! PS - in the second image below you can see that the copper pipe leading into my oil tank is a bit loose - in so much as it can be lifted up a few inches - is that an issue??? Thanks, Matt.