I have a 2006 Ford Taurus 3.0 V6. My check engine light came on and I got it scanned at the parts store. The reading was a misfire.(It was not noticable.) Since my car has 95,000 miles on the original plugs and wires I assumed that was the problem. I changed both items and now there is a much larger misfire. I then changed the coil pack as the next step and the misfire just seems to be getting worse. I properly gapped all the plugs and the wires are not crossed and are going to the correct cyclinders.