I don't like using the tank drain bolt it makes for lots of vapor and
tends to spill fuel everywhere if you have to put the plug back in and
empty the container 1/2 way though.  A definite no no if the car is in
a garage.

Locate the fuel pump relay and make up a switch (should be a sealed
non sparking type switch, about 5amp) on leads that you can plug in to
the relay base.  The relay will show which pins are the switch
contacts and will have small numbers on underside next to the pins, so
you can work out which terminals to plug in to.  Undo the fuel line at
the filter outlet and put a long fuel tube on it to reach a Jerry can.
Switch on and pump fuel in to can.  Switch off when full and if needed
start filling a 2nd can.

When system is drained, replace fuel filter with a new one put a few
gall of fresh fuel in.  Take spark plugs out, disconnect power
transistor.  Switch ignition on and off a few times, each time wait
until fuel pump stops running (about 5 sec).  This will prime system
with fresh fuel, it will be mixed with whatever old fuel is in the
retun line and fuel rails.  Mark CAS (timing sensor) position and
remove.  With  ignition on, use a length of dowel or a screwdriver
(sharp end on injector, blunt end to fleshy part of ear - not in ear)
to listen to each injector as it opens and closes while you spin CAS
by hand (need about 4 hands so an assistant may be needed).  If any
injector doesn't "tick" then it needs stripping out, cleaning, testing
or replacing.  Assuming they all tick then a few ticks will purge the
old fuel from the injector and into the manifold.  Replace CAS to
marked position and crank engine with plugs out to blow the fuel out.
Replace plugs and reconnect power transistor.  Start engine (if you
are lucky).

Once fully warm stop and drain oil, replace with fresh.

Coolant, brake fluid, trans and diff oil could do with a change too
asap.

New drive belts.  Although Nissan say cam belts have a 60K mile life,
4 years standing means they should be done soon as well.
--
Peter Hill
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The engine is probably OK but it's not ideal for it to sit this long.