I have a. 2005 Pontiac. G6. An i had it tested at auto zone an it said it wasn'.

What is your question?

Had my car tested at auto zone and it said it wasn't firing on number 2 piston so I put new plug an new coil pack an still doing same thing took off the plug wire an it is firing but still codes as not firing misses worse when idle an at slow speeds an rattle

What makes this problem better or worse?

Same no difference

How long has your 2005 Pontiac G6 had this problem?

Bout month