Engine Fires But Wont Stay Running...Please Help!!!

[jcfreeman0]

I’m finally ready for to fire up my motor and I cant get it to start. I’ve got a 2001 4.8 truck engine. It has an LS1 intake manifold, 28.8 ls1 injectors, ls1 fuel rail returnless style, MSD fuel pump, Professional Products Fuel Pressure Regulator, Removed EVAP system, Removed EGR, Shorty Headers, 220/222 110 LSA cam, SLP ti springs.

Anyways I’ve tried to get the motor to fire and it fires right up but immediately dies like the computer is shutting it down. Do you think this is a tuning issue at this point? I do believe I have everything hooked up but I could have missed something. Please help!!!