Sometimes car will start, sometime not. We have replaced main relay and problem still persists.

Saw this as question but did not see an answer. Did anyone ever figure this out?

. Perform tests, in Sections A and B, below:

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

. Ensure spark plugs (NGK only), rotor, distributor cap, and spark plug wires are in great shape.

. Replace the Ignition Control Module and coil, if problem persists:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-46563-4.html#post265896