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My check engine light is on. on 2004 Chevrolet Malibu Maxx

I've already replaced the spark plugs and wires. What else could it be? The code that it pulled was cylinder 1 misfire. I don't remember the actual code though.

Asked by for the 2004 Chevrolet Malibu Maxx
may have been a 301 code.check the coils.