2004 6.0 cranks but wont start

[04_6.0_stroker]

Ive got a 2004 6.0 that cranks but wont start put a brand new ipr in it an it ran for 3 days went to drive it the next day an it started just fine but had no power while driving it started sputtering an then died an wont start it thru 3 ficm codes an a tps code so i put a new ficm in it because my batteries were toast so the shop said to buy new batteries cause low voltage can cause problems so i got 2 new batteries an put a ficm in it an it still wont start it cranks an cranks but wont turn over it tries but wont fully start an run what is my problem???

[kaya@bernhausen]

if you've got 3 ficm codes, replaced ficm and problem still persists, i'd be willing to bet the ficm isn't receiving logic power. check the ficm relay