Hey guys, I need your help!

I've got a OBD1 JDM P72 ecu out of a dc2 VTiR for my swap in my ek.

The ecu runs the car with the stock rom, but when i jump J1 on the back of the ecu. The ecu throws a CEL Code 0.
And the S300 doesn't read any sensors when i have it in with J1 jumped, J4 removed.

For now, I removed J1 so I can still drive it around.
If you guys have any ideas, let me know!