87 300td(om603) won't start
 

If I crack the injector lines at the injectors and crank a while I eventually get fuel spurting out. Once I get the fuel there and tighten them back down it starts. Once running properly, can shut down and it starts right up again. However, if I let is sit overnight, it won't start and I need to do the purge again.

It's not sucking any air, as I've remedied that situation.