boxer van fuel problem?


hi there, i am after some technical advice.

i have a boxer van with a 1.2 lombardini engine diesel 35hp

after the engine being changed due to excessive oil consumption the engine now refuses to switch off, when the key is switched off. the solenoid has been changed and tested the feed and return line has been clamp and the ignition switched off, and it still runs. the copper feed pipe between injectors has been pressure tested and is ok.....

this is where i am now stuck...

any advice or hints or tips etc greatly appreciated.