i am having an issue with my 1994 6.5 td not starting. i have just rebuilt the motor and had it running, it got hot and i had to have it towed home because of air in the cooling system i later figured out bc it was never bled while running just poured in. once i got it back i tried restarting it to bleed the system and it won't start. it cranks just fine, rolls over fast on 2 brand new batteries. i get fuel at my injectors, glow plugs are all brand new, crank sensor brand new, replaced again to make sure wasn't crank sensor, timing has been adjusted to see if it had gotten off, replaced pmd, loft pump and fuel pump work, just super stumped bc it won't start. i am getting codes dtc 17 & 18 but it should still start in limp mode even if cam sensor is down? extended cranking may be an effect of that but it won't start. have spent weeks trying to chase this problem and cannot seem to get it.