car is running lean(16.5-18) at 1800 and 3000rpms. I have a 50trim, stage2 pcm, 750cc, boomba rail, aero regulator @40psi, 255 pump, safc2, plx wideband. this is low speed driving around town. I am 5 to 10% plus on the afc through the low menu and the car still chokes. I dont understand why I should have to increase fuel if I put in 10% larger injectors than the 682s. I should be taking away atleast 10 to 15% in the low menu, correct? could there be something wrong with the egr or the evap system putting too much air back in the motor? cel comes on and says map sensor low voltage. whats the deal.......anybody have an idea?!

 

My initial guess would be it is an issue with the afc. Which one are you running?

 

apexi safc2. controller works great under boost at higher rpms 4000+. in hi menu it is at 20-25% less across the board. something I thought of doing was taking the afc out and just running with the stage 2 ecu and the wideband. granted there would be no way of tuning but if the wideband is still in the green I can see if there is a problem with the afc.