Check Engine LIGHT

[ven0m319]

i went to autozone today cuz my check engine came on getting off the highway. i got a 2005 mazda3s 5sp Hatchy.

there was only one code but the computer said it could be a mis firing 3rd cyclinder, fuel air gain ratio or something like that,
how would i go about getting this fixed. just wondering need some mazda head help here


thanks guys

 

[08blkmca-3hatch]

Misfire could be bad spark plug or coil pack. Then again, bad air/fuel could be the injector which can lead to the misfire

 

[ven0m319]

how do i go about tuning the fuel/air ratio would that intail getting a new fuel injectors or just tuning the ecu