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i know...i mean what's the reason to cause the car running lean. because my car was running rich before, and couple days ago, i tried to tight up the bov screw, after that now the idle is like low 15 on my wideband. and I did search online, the tightness on the bov screw doesnt not make the car run lean. Only if it is TOO loose, then the car might run rich. So I thought my car was running rich because of the screw was too loose. and actually my car is running lean. My car has stock boost 7psi, stock injectors 370cc and stock maf. Its a SR redtop. right now, I tried to adjust by the safc so the car doesnt run lean anymore. But im just wondering why everything is stock but the car is lean??
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