Prostar problems

I recently purchased a 2011 prostar and about 2 weeks ago it took a crap...driving down the road and all of a sudden it stalled like someone turned off the key. All my levels were good and had enough fuel (fueled up at a mom and pop truck stop the night before and parked the truck right after) next morning I only ran about 20 miles before the truck stalled...towed it to a shop and even though I told them about the fuel they connected the computer and was told it was the ECM...long story short they changed out the ecm and the crank sensor and my truck still won't run (except with started fluid) and now they are telling me my fuel lift pump does not work...any thoughts? My truck has been in the shop for 2.5 weeks and I need to get rolling again. Thanks.

 

The check engine light came on and the dash started reading electric fault...they connected the computer and the cummins program wasn't reading so they used a generic program that told them it was the ecm...once they changed the ecm and it didn't start I started messing with the fuses and the cummins program started to read and thats what told them it was low pressure on the fuel pump and the code was 2215...anybody know what the correct pressures should be? They are gonna test it out right now but I want to have some info for myself. Thanks

 

I'm not sure what the actual code for the ecm was...

 

I'm not so sure about the shop either but don't know of any shops in the area...my original thoughts were on the fuel itself, fuel lines or fuel filters being plugged...I can hear the pump when I turn on my key.

 

Heavyd- but the check engine light came on after the truck had died when we were trying to turn it on with the started fluid and that's also when it started saying electrical fault...don't know if it's got anything to do but the abs fault also came on...all after I tried to turn it on with starter fluid