I changed fuel pump and filter. Changed 02 sensor and crank sensor, checked timinig belt.still won't start don't know what's up.

Will it turn over? Or when you turn the key, nothing happens?

Yes it does turn over. We hooked a computer up to it and nothing is coming up.

Perform tests in the link below:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-11.html#post2123675

Clean the main ECM ground. Check all under hood and under dash fuses with a test light or multimeter. Check the ignition switch for wear, pitting, or melting. Is the ECM bad?