1. MIL and VSA light comes on. MIL light flashes
2. Misfire at 1500 RPM
3. Long start time
Parts Changed.
1. Spark plugs
2. Crank sensor
3. Intake manifold gaskets
4. Map sensor
5. Fuel pump
6. Fuel filter
7. Fuel pressure regulator
8. MAF sensor
Parts Checked
1. O2 Sensor 1 ( swapped it out with the one from my wife’s car )
2. Coolant temp sensors ( ohm test )
3. Valve clearance
Pending
1. Compression test (good)
Codes
2. P0300
3. P0302
4. P0303

You may have a clogged oil control solenoid screen. See this post
http://ricksfreeautorepairadvice.com/honda-hard-start-rough-idle-p0300/