Cylinder misfire on 8 , checked plug looked good. No carbon, the coil seemed good also, maybe injector? Also on code p1131 says lack of H02s11 switches sensor indicates lean..? I'm lost .. need major help. It's a 2001 Ford f150 4.6

 

Respectfully, it's hard to help you with 3 different threads going from you.
Combine them so there is some continuity.
Good luck.