So recently traded out my blown 6.0l for a used one. Install went ok. Determined that the ficm was bad in the used motor when 4 injectors wouldn't work when we tried starting it. So replaced it got the codes to go away and got them working. Still truck won't start. In the scan tool it says that the ficm isn't in "sync" I'm.guessing that means to the main computer. Anyway not sure if that could b a problem or not for getting it to run. Other code I got was for a bad glow plug. Which should b ok in terms of getting it to start up. All my pressures amd pumps are fine and getting fuel . Not sure if there is still to much air n the lines perhaps mayb the issue. They're bubbles coming up thru fuel filter. Not sure how to exactly purge all the air from the system. But was thinking that it should atleast start and shut down at the very least even if there was air in there. Also while putting the new motor in we put the upgraded oil cooler in and egr delete. Wouldn't think these would have an impact on starting but what do I know. So if you guys have any thoughts on why or mayb would I could try or look for, to try and get this thing started I would appreciate all the input. Thank guys.

 

I'm no expert but pretty sure you need FICM sync for it to start. I'm betting on a cam sensor issue. If I were you I'd move this over to the 6.0 forum. There are some real good guys over there who will help you get it running. Good luck.

 

Will do. Thanks bud.