![](http://ecomodder.com/forum/member-christ-albums-f150-4-9l-5-speed-picture1737-dscf2505.jpg)
All the plugs from the engine
![](http://ecomodder.com/forum/member-christ-albums-f150-4-9l-5-speed-picture1736-old-1-spark-plug.jpg)
This was #1... they're all this bad, the electrodes are worn at nearly 45* angles, and the ceramic insulator is burned on the opposite side of the angled wear on every plug.
What would cause that, other than age?
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