Extreme rich with warm start, and lean revs
Im new to forums but i need help. You can view my mods but brief rundown is this, 02 wrx, 2.5 sti shortblock, ported and polished heads, 8.5 compression ratio, forced performance 7cm 20g turbo, godspeed top mount intercooler, samco intercooler hoses, 3 inch turbo inlet hose, 640cc injectors, walbro 255 fuel pump, aem cai, dc sports up pipe, bellmouth downpipe, 3 inch custom exhaust with straight through muffler, tgv's removed (sensors left in place and in correct position), hks fuel cut defencer, apexi afc neo fuel controller, aem wideband fuel controller, 9 lb flywheel and act clutch. My problem is this, on a cold start the car runs perfect, however warm start (turning car off and leaving off for <30 min) results in extremely rich conditions like <10.0 on wideband and smokes like crazy and sounds cammed to death for a few minutes and then runs fine. If leave off long enough for everything to cool such as 45 min or more, runs fine on start up. Also when revving engine, short throttle pulses, car immediately goes lean, like hesitation but then revs, like 18.0 on wideband, when warm, not during rich conditions described earlier, but after car returns to normal. My best guess is this has something to do with the car running fine in closed loop, and running crappy in open loop. Already replaced O2 sensor and MAf sensor. What else could it be other than i need a stand alone. Im at my wits end, I've done enough for the car to be fast, im just worried that the ECU is too smart and i need to 86 it. Help or ideas please!!!