Civic 93CX Swap Zc started and stop ... help please...

I just swap a DOHC ZC in to my civic 93 CX. I try to save money so just the engine I swap. Somehow the engine start to run but choking stop in a moment. What can I do to keep it running?

Diagnose why it's stalling, and fix it.

Vague questions get vague answers. Have a nice day.