i have 440s in my car and have no air fuel ratio adjustment, and it has never run lean. how do you figure it will run lean when your putting larger injectors in?
I was seeing AFRs of 15-16 on boost, that is NOT very rich, I had to significantly richen things up to make them happy...
I can only think of one reason, and (remember, I have the ECU and AFM out of a v3 STi aswell), that is that the VE is significantly different, to the point that I'm coming on boost but not showing enough airflow to get the enrichment needed...
EDIT: my only other suspicion is that one of my fuel regs has failed out, but I'd be expecting to see det on the closest cylinder, of which I am seeing none (with knock meter)