I have a Nissan with a SD22 engine. The fuel filter is equipped with a hand primer pump. The problem is that if the truck sits for, let's say a week, it will not start without priming the fuel. We have attached a hose with a cannister of fuel directly to the injector pump and it does not bleed down.
Is this an inherent problem with this engine and that's why it is fitted with the primer pump on the fuel filter and if not, what else should we be checking.