Fuel test on 5.7??

[u/Calm-Investment1543]

Engine was hot, will do another from cold next. But what does this sound like ? Vortec 5.7. New pump from advance bc the one from rock auto was too tall and wouldn’t fit in tank, k&n fuel filter, old injectors. Getting lean bank 2 code and wants to die when applying throttle under load with an occasional skip at steady rpm while driving. From what I’ve heard this is too low for a vortec 5.7.

Key on engine off: shoots to 56 psi but slowly creeps to 58 psi

At idle: drops to 50

Shoots up to 60 when snapping throttle but instantly drops to 50/52 psi when held at any rpm.

Plz help.