4.2lt turbo Nissan Y61 starting problem

Have you tried disconnecting the battery and see if that fixes the fault. Also check the 10amp fuel cut off solenoid fuse at the panel near your drivers door on lower dash. Also could be a fault in the key for the security system, try your spare key if you have one. A security key is only on vehicles made after mid 2002. Michael

Tried disconnecting the battery. It’s a 2000 model. Can’t find a solenoid 10a fuse. Fuses seem okay. Thanks

Judes
Is the filter light normally ON? was it ON before changing filter? many people twist the wires at the exit of filter bowls and actually twist the wires together, which then full time indicates with a light. I don't know what light should be showing with the sub switch off, so can't comment.

Is there any white smoke exiting the exhaust when you crank it and try to start? if no, then the fuel pump may not be injecting. for some reason, ie, a start point. no pun.
If there is white smoke or some smoke it may be too cold and the heaters aren't working. If the heaters are not working and that is the problem, use a hair drier into the intake to provide HOT air as an alternative.

You say there is plenty of fuel AT the pump but is there plenty exiting the BLEED of the pump, quite a different thing!

There is a electrical connector that plugs into the back of the fuel pump - try pulling that out and plugging it back in again - fixed my similar problem when I had a Patrol.

Good luck

Cheers
Gazz

Crack an injector line at the injector and see if there is any fuel getting to the injectors when you crank the motor.

Silly question but did you pump the manual pump on top of the fuel filter until it was hard? An air leak in the line will quickly let the fuel run back to the tank. Michael

When I owned a 3 litre patrol 2002model the motor would not start with the sub tank light on .There were problems with the earthing system from the motor to the chassis and body. All patrols did suffer from this earth problem. The fix was to fit a large earth strap from the gearbox to the chassis & body under the vehicles
Then remove and clean the existing earth from the battery to body and motor.
By disconecting the battery this should clear the sub tank light
then it would start .
Worth a try

Check the breather on fuel tank.
There is a small gauze fuel filter on the bottom of the injector pump which can clog up , its recessed about 20 mm into the pump body , get a paper clip and make a small L on the end about 3 mm place in recess and gently remove filter , clean & replace .


https://patrolapart.com.au/product/genuine-zexel-td42-injector-pump-gauze-filter
https://www.google.com/search?
q=patrol+injector+pump+filter+pictures&sxsrf=ALeKk033BuTTM136NTZZCnQk1pOtulFHWQ:1626849901116&tbm=isch&source=

Thanks for your replies everyone. Found a split in the filter outlet pipe creating air in the injector pump. Hit her with a bit of Aerostart and away she went.

Glad you got it sorted, only takes a bit of air....