Have a recurring error code from check engine light showing misfire on 2 and 5 on 1999 Toyota Camry

I have already done the following:
1)Changed plugs and plug wires
2)Changed the coil pack at cylinder 2
3)replaced all vacuum lines
4)Cleaned choke and all associated sensors
5)Added seafoam to fuel (hope to clean any clogged injector)and poured some in vacuum line to clean throttle body
could I have a stuck valve?
What is the recommended next step

Asked by for the 1999 Toyota Camry