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

by in Carlsbad, NM on February 15, 2012
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