Welcome to the Nissan Patrol forum. To post a question and to see less adds on the forum then you will have to register
first. We are an easy going friendly forum so join in the conversations and feel free to ask any questions.
Become a forum sponsor for only $20 and see no adds with faster page loading times and many extras benefits.
The unused fuel would be returned to the tank I would think.
The difference is, when you use the hand primer, it sucks fuel from the tank and it comes out fine... Trouble is, you have the injector pump between the primer and the engine/injectors. The pump is your middle man and from the sounds of things that isn't working for you for some reason. Cranking the engine won't do jack unless you have diesel pumped by the injector pump to the injectors...
I'd really be interested to see what / if any codes are on your system.
N.A.T.S 1401 and 1405
2001 NISSAN PATROL GUIII 3.0, 33" A/Ts, 2" EFS Elite Lift, Dual Batteries, Boost Gauge, Spotties front and rear