2007 EB 4.6L cyl 7 missfire code

[gga357]

How often do the over plug coils need to be replaced? Trying to decide if I should attempt changing the plugs myself. And if I do change plugs do I change coils or do you just keep and replace as needed one at a time? I have read about the special tool for replacing plugs if they break but have not been able to find pictures or diagrams.

 

[swetrid]

#7 usually gets water in the spark plug wel and causes misfire, just remove the coil and inspect and blow the water out.l

 

[gga357]

#7 usually gets water in the spark plug wel and causes misfire, just remove the coil and inspect and blow the water out.l

Thanks will check.

 

[gga357]

This has alot of info.

http://www.explorerforum.com/forums/showthread.php?t=319427

After reading this post and the posts and links in it, I think I will have it done and then from that point forward do it my self every 25k-30k. I am at 70k now and am sure that there could be problems.

I would still like to know of peoples experience with how long the over plug coils last. Thanks.