emissions

Which way do you turn adjustment screw on the fuel distributor to make it run leaner at idle??? Thats a 82 320i. I think the allen key should go inside that little whole thats barrely accessible? I failed emissions. The part where they monitor idle. I got pretty low CO but my hydro carbons (gasoline) are 5 times higher than normal. Other than that its in good shape. I took the whole thing off , and i tried to adjust it a bit (conter-clockwise) and the screw is almost maxed out. Maybe some dumbass missadjusted it??

Thank You

anyone?