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The reason the check engine light is flashing is to tell you that you are dumping enough raw fuel into the calalytic converter to cause major damage to it.
There is no time adjustment on those vehicles and that wouldn't do anything for the misfire anyway. Your first step is to have the codes read and they will give you vital info for diagnosing the problem. Don't continue to drive it like this or you will be looking at a $1500 converter repair in addition to the original problem.
If you have an AutoZone in your area, they will read the codes for free.