'98 Expedition "System Too Lean", P0171, P0174
WhyFord,
I just replaced it with a new Ford line (you have to replace the whole assy). I did toy with the idea of making my own for the same reasons that you stated. I still have my old one and if I have a problem with the new one I will then build/modify my own.
I'm glad I was able to help!
Britt