if coil pack and coils have been replace and module is ok then the next thing would be the injector. To properly diagnosis this it is easiest to make or purchase test plug wire to remotely locate coil assembly and preform a kv test on the effected cyl. you can also pull the spark plugs and see if it is wet with fuel due to no spark or dry due to no fuel.
I hope I have been helpful. If more info is needed just ask.
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Thanks Tim