i have a 1996 e39 525 tds which has now decided t not start ? lift pump is fine, new diesel filter, new liftpump relay but what i have noticed isthere is no power to the lift pump and if i put a supply to lift pump it still will not start as no fuel gets to injectors its as if there is a shut off valve on or as if it is imobilised etc but i am stuck now. any ideas ???