I'm out of ideas I have a cylinder 6 misfire that I can't figure out. Here's what's going on. New engine started up with got 2 codes misfire on start up and number 6 cylinder misfire. I replaced the plugs and swapped the coils around cleared the code still came back with the same codes. Next I swapped the number 5 injector with the number six injector and still got the same codes. Car is tuned what's my next step?