i have 2006 king ranch 5.4l, it has a misfire on cylinder 1, it hesitates at between 60 and 90 km/ph, the tech's at my local ford dealer are stumped, they moved the coils around to try and get a different cylinder to misfire still says cylinder 1 misfire. I was wandering if anybody has experienced this and if so what was it.

 

You're going to get more views by the folks that might be able to help in the V* section, so I will move this. If you want it moved back, let me know.

 

Spark plug

 

The techs are probably scared to pull the plug.