While my truck is idling, it is running slightly rough.

What is your question?

My Foxwell says it is a misfire on #5 cylinder. I changed the coil and regapped the plug. Note: I replaced the plugs less than 100 miles ago.I have checked each plug to make sure they were all gapped correctly and reinstalled. Thinking it might have been the #5 coiI, I replaced it. The plug for #5 cylinder was really close so I regapped it and reinstalled. I had bought extra coils, so, considering maybe I had defective or maybe incorrect coils, I replaced #4. My Foxwell still shows a misfire on #5 cylinder and I still have the same engine miss.What to do? The #5 spark plug looks good.