VOLVO L90 Loader random intermittent stalls

Hey guys my crew are having problems with our L90 loader.
the issue is that the engine will randomly cut out, to get her going again you must select neutral and turn the ignition off.
she will then either fire up immediately or take about 2 cranks at around 3 seconds each.


i have checked fuel filters and fuel at the common inlet,disconnected cleaned and reconnected many many plugs and fuses.
it happens when sitting still and selecting gears or when travelling across ground.
she has a belt driven fuel lift and low pressure pump.

there was a thread on here with the same loader same problem but the bloke that started it never got back with his findings :(


any help would be awesome

Ryan