rough idle at a stop, check engine light came on at the same time.

What is your question?

I have had this happen many times once it was a burnt valve, so I had a new motor with low mile installed and ran fie for a year. Another time was a burnt valve again so I had the complete valve job done no holds barred. Many other time the check engine light would go off by itself. This time I have a check engine light and a rough idle?