My LS/Vtec coversion runs so lean I'm afraid of driving it and can not find problem that causes such A/F ratio.

My setup is
B18B block
B16A head
P30 ECU
B16A Intake manifold

I wonder if someone could give me sum clues what can I do to increase A/F reachness. Can it be problem with ECU, so I hould use 1,8 VTEC ECU?