5.4 misfire
Hi, I have a 1999 F-150 4x4 with the 5.4. It was missing bad and had misfire on #2 and #3. Found bad injector on 2 and bad coil on 3 replaced them and plugs and miss went away. Its running good but about every 100 or so mile light comes on and I have code 303 and 171, misfire on #3 and lean on bank 1. Can't find anything wrong, thinking injector. Any input would be appreciated. Thanks in advance.