help running rich

[pepe2403]

ok, i just have done port&polish (heads&intake), 3d valve job, crower stage 2 cams shaft installed, aem cams and now i'm running to rich and i have a miis fire on cylinder#4.

What do you guys think is the problem?

 

[GSX90]

how do you know you're running too rich? please explain with a bit more detail...

 

[pepe2403]

well, like i don have f***** time to go back to the mechanic that work in my car, i stop in auto zone, and they give me this codes p0172&p0304,
but the car runs fine but i have cel.

 

[pepe2403]

by the way the cel goes on and off all the time