Well, after a little searching I was able to find what the most likely culprit was for my p0191 code. This is the back side of it.




Say hello to a "fuel pressure drive module"

It's also got some of what appears to be a burn down inside the plug but it should be okay I believe. I'm so glad to have this resource to investigate problems.

Ryan.

Also. Rock auto has them for $57 as opposed to $109 from Napa.

 

The $57 ones are Dorman, and are no good. Get a Motorcraft. You will get the best price from Tasca.