[tholyoak]

If the AFM screw isn't doing anything, I would suggest that you may have an intake system leak or that the o-ring on the screw is missing/not sealing. Although it seems you don't have a good way to test that it really isn't doing anything. As suggested, you can just look at the narrow band O2 sensor voltage and see if the screw is really doing anything or not.

Is the hose that runs from the rubber throttle body to AFM hose to the oil tank installed? Is the restrictor (brass cone looking thing) installed in that oil line?

-Todd