Have 1988 civic wagon 1.5
Replaced relay
Fuel pump (good pressure 45psi)
Have spark and fuel
And still no starting
Only code O2 señor
Any ideas

Perform tests, in Sections A and B, below:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-46563.html

Be sure to perform K-Test on the ECM. Ensure 3-pin MAP Sensor connector is not corroded. If the car passes all tests, you may need to replace the distributor housing, due to bad internal sensors (CKP, CYL, or TDC).