New, first post. 2006 6.0 FICM was changed a couple months ago. Just replaced the injectors. Put it all back together and now the truck won't start. Bled the fuel for a long time to get air out. Had it hooked up to battery charger on a 2. Try to crank and the battery dies after a few cranks. Can't figure this out. The scan tool is saying. Injectors 2&8 circuit low, but not every time.
Please help

 

youre problem is you have a 6.0

 

Yup, thanks

 

You have to get batteries fully charged and still put charger on boost till you get it to fire. You need good 12 v for ficm to work properly. What injectors did you buy? Some were known to have problems, it's not impossible to get a bad one or two

 

Turns out it was the IPR. Was sucking all the juice from batteries. Put a new one in and the truck started right up. Now just have to change a couple glow plugs and will be through....for now. Thanks