rb20 not starting but cranking just fine?

[Powered Bya Skyline]

alright guys heres what i have going on, i have a rb20det and from my knowledge iam the only person to get this car cranking and starting. i started the car up a couple of days ago, it started up this morning, by the time the rpms reached 1500 from start up it killed itself. now iam getting the car cranking, it sounds like its starting but when you let off the key the car kinda falls on its face. i checked the gas it has 2 gallons in it. all the grounds to the pcm and so forth are all connected. i have fuel pressure, just not sure on how much. my question is 2 gallons enough to start the car on a slight decline? is there anything else that i could be missing? thanks guys

[TheRBguy]

Check the ECU and see if it is throwing any codes.

[Gabes13]

whats your wiring look like? did you do it yourself or did you send it out to someone?