The parts are all OEM Honda parts. I've tried holding the gas pedal
down while cranking for 20 seconds. The Engine still won't start.

No, I don't have a way to check for fuel pressure. But I would like to
test the MAP and IAT sensors - can you explain where those sensors are
and how to test them? Thanks!

Also, is there a way to determine whether the sparks are strong enough?
I've read somewhere that strong sparks should be blue? However, my
sparks are yellowish. Does this mean my sparks are not strong enough?