JesterX18

So I finally have my SR20 running. I have an aem wideband where I base all my readings. The car's AF ratio is 12.0 under boost, around 14.7 cruising, and of the charts lean at idle. The funny thing is that on a cold start is sits perfect at 800 rpm and 14.7 AF for about 5 seconds then climbs off the charts and starts to misfire slightly. At first the exhaust smelled rich to me and I thought my gauge was wrong, but after unplugging MAF it idled smoother and the AF was around 10 then it smelled rich. So my set up is a typical GT2871r,Z32 MAF, 810 DW injectors all controlled by a Jim Wolfe Ecu. I have tried seemingly everything including another Ecu(same tune) still runs lean. Datascan isn't showing me the problem either. Searched this problem for weeks and no one ever solves it. Anyone got an idea?