2004 Ford F 150 Check Engine Light On Had Autozone Put Computer Coming 3 Codes

I HAVE A CHECK ENGINE LIGHT ON AND I HAD AUTOZONE
PUT IT ON THE COMPUTER AND ITS COMING UP WITH 3 CODES - MISFIRE ON # 8 CYLINDER , # 8 CYLINDER TO LEAN
MISFIRE AT LOW RPM , I HAVE CHANGED ALL 8 COIL PACKS
AND ALL 8 SPARK PLUGS AND CHECKED THE COMPRESSION
ALL ARE GOOD , STILL IDLES AND RUN ROUGH AND IT STILL
GIVING THE SAME CODES , HELP ME PLEASE