Push the accelerator to the floor and hold it there while cranking with the lines cracked open. When you do this, there should be strong spurts of fuel expelled from the union where the hard line meets the injector, visible from the driver's seat. If that doesn't happen, then your pump is having trouble moving fuel internally. That is often due to an inability to maintain prime within the pump, which happens when either the front shaft seal leaks air in or the head seal leaks fuel out.
If there is an issue with pump function, try filling the pump with B100 biodiesel and within minutes it will most likely work perfectly. It is not a permanent fix, and will revert back to non-starting mode as soon as you put a tank of straight ULSD in it, but the bio will fix the pump seals and once it's done that you can safely run down to about B20. Below that you risk having problems recur. The "proper" remedy is to have the pump rebuilt, but that costs $600 to have it done properly. $600 buys a whole lot of biodiesel. ;-)
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86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
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