My cars check engine light came on about a week ago... I went to autozone today and had them scan it, the scan came up too show that cylinder 4 has a misfire malfunction, what could be causing this? all my mods and specs are in my sig

 

Could a bad MAF be a cause of this

 

Or a bad coil pack. Swap the #4 coilpack with #1 and see if it moves the misfire.

 

I actually had that happen couple of months ago, i just put in new spark plugs and reset the code , i think i had a bad spark plug, hope this helps,

 

check resistance of coil pack #4 and compare to spec or simply switch it w/ another cylinder's coil pack as mentioned. good luck