If the engine ran before you started playing, the lift pump is supplying fuel to the injection pump and nothing else has been touched, it should run after bleeding to pump and bleeding injectors. If the lift pump relay is bridged the injection pump will self bleed after a few minutes. The only thing that then needs bleeding are the high pressure pipes to the injectors. They can only be bled as previously stated. Have you had someone playing with BECM settings?Tried this little or no diesel. Checked fuel filter drained small amounts of water but mostly diesel. 12v supply going to FIP. I will renew fuel filter as it is old probably not helping.