05 F150 codes 357 and 2198
 

Having trouble with my 05 f150, codes 357 and 2198 came up truck was not running great. Checked the coil and plug of cylinder 7 and the plug was in bad shape. Replaced and checked the o2 sensor for the second code and it didn't look too bad but replaced it anyway. Truck is still not running very well and 2198 is still coming up, 357 hasnt come back. Any help would be appreciated.