Code P0300 & no spark on 1-4 Coil
2000 Bonneville w/125,000 miles. 6 weeks ago, my MAS had to be replace, and while I had the car in for repair(Dodge dealership), I went ahead and had them replace plugs/wires since this had never been done. Car ran fine until last week my check engine light came on, flashing, car running extremely rough. Luckily I was only a mile from home, so I was able to drive it back. I have a Ford mechanic friend with a scan tool that showed only code P0300. He then pulled each wire from it'* coil checking for spark, and the 1-4 coil wasnt showing any spark. I replace the coil but no change. He suspected the ICM, so I replaced that but no change. I guess it could be that both wires and/or plugs went bad, but I find that hard to believe both would go bad like that. Any ideas what else could cause this scenario?