i was so frustated i could not find that stupid evaporative emission leak,when i started checking the spark plug wire on the passenger side,i found out that the bar where the ignition coil pack bolt connects to the exhaust manifold is broken,thus letting oxygen enter and triggering the oxygen sensor on bank one and giving me P0171 CODE,i went to the junk yard and grab me some bolts and i found 3 3.0 rangers of them and you know what i found,all 3 of them have the same broken bolts on it,which i assume a common problem on a 3.0 v6 engine,the only bitch thing is i dont have a right angle drill nor a screw extractor to remove the bolt so for the mean time i put a vise grip lol,it does the job though
Spray that part down with PB blaster. let it sit for a few minutes. Take the vie grips and grab ahold of it and try to get it out. Or if you have acess to a small propane torch heat it up and use the vide grips.