Hello, need some help, I have a 2006 f150 4x4 with a 5.4l I've got a problem that Id like some help with, seems the truck has fuel coming out of the exhaust and the error codes I get are that the o2 sensor signal is bias/stuck on rich, but the truck is also misfiring at idle, does any one have any Idea how to correct this (ie. injectors or coil/spark plus). other codes I got prior were multiple misfires on 2,3,and 4 but had to change out starter so they were erased.