Still lost. car running pig rich after tune

[bahlorm]

Hey everyone I'm having 1 hell of an issue. I have a red top sr20 that's been giving me problems for the past 2 months. I got an enthalpy tune with a t2871r turbo 550cc injectors and a z32 maf. I had the turbo already but bought jecs 550cc injectors and the maf.
After install I originally had issues with running too rich and the engine wanted to die. Found out my plugs were fouled. Now after new plugs I am still having the same issue. The cars running so rich that gas is spitting out of the exhaust.
I tried about 6 different maf sensors. Sent my ecu back to enthalpy to verify it is correct, checked for vacuum leaks, got new plugs, and so on. I'm lost at what to do next and I need this car going by march if I want to make it to the first autocross event.
I checked the codes on my ecu. And I continue to get code 12 for maf even after replacing it so many times and going through the wires over and over again. And a new 1 today was a code 11.