Rich idle (help)

[absolum]

Guys I need some help. I usually post here when I run out of ideas because I pretty much tried everything.Car was running great with the 370CC injectors. Recently installed some 550 sard injectors. Car is now boosting fine but the idle is super rich , it's pretty much idle in the 12.5. smelling gas from the exhaust.

I have the safc for tuning, Assuming that the car is idling , air fuel will be in the 14's and slowly drop to the 12's , once in the 12's , air fuel will pretty stay there.I gone -50 on the safc on the 800 rpm mark and car is still running rich, air fuel does not move while making the changes, Once you hit the gas , then the setting take effect briefly, car studders and even die, In order for my car to be able to idle after I touch the gas, safc need to be in the -20's.

The safc is obviously working but it's just that the car goes in some kind of mode and even the safc can't adjust the idle till you hit the gas or something.

Things I have checked so far, vaccum leaks are all gone, O2 sensor , safc has been tested on another car and works fine. maf(z32) is fine , adjusted to stock fuel pressure 42 psi with unplugged vaccum line. pressurized the rail with the injectors in it and no leaks ( seals are good). they are pulsing proprely with you move the cas. Timing is at 15 degree. BOV is not leaking and has always been recirculating.

Mind you that while driving the safc respond fine, air fuel are dead on 14's and low 12 under boost. I am only having this rich issue while idling.

What else can I check?