Engine Light Blinking, Cylinder #1 Misfire on 2001 Mazda Millenia

Was driving when I noticed the engine was slightly knocking, I looked down and noticed the engine light blinking. After about 10 minutes of driving the knocking ceased but the engine light continued blinking. Turns out I have a Cylinder #1 Misfire. I dont understand!! What could be the problem? I just had the Coil Packs and Spark Plugs replaced last year.. Or I think. His shop is now close and Im living in a diffrent state. I dont see that he changed the wires. Im hoping its the wires. I dont know. Thats why Im come on Repair Pal. Any guidance would be appreciated.

Asked by for the 2001 Mazda Millenia
If the wires were not replaced, well that was very poor work. Get a good set of NKG wires, don't go cheap or you will regret it. And then clear the code, by disconnecting the NEG battery cable for about 1 minute. Then test drive and see how the car runs.
Thanks for the reply. I have the receipt of what he did but who's to say what actually got done. The guy was only in business for about 8 months. If I do change the wires and it dont work what would you suggest? Or from how I described it what would you think the problem would be?
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