I just got a 2012 GT Manual from a knock off dealership, on the way home check engine light started blinking and hearing and feeling missfiring. Get it checked at from autozone with their reader and its cylinders 4, and 7 misfiring. Checked the MAF sensor and that seems brand new, we checked spark plugs and ignition coils and coils 4 and 7 seem to be replaced already but is still having issues. Took it back in and they said check the fuel injectors. I have not done this yet because i dont want to keep pouring money into a problem if its not going to fix. We did not check the cam position sensor because my buddy said if it was that sensor it would be missfiring all the cylinders. So do i try and change the injectors or do you guys think it is an electrical issue when they tried to tune it or something?