What does turning the ALDA screw CCW do? I thought it gives it more fuel? I am not getting any smoke when flooredd, i.e. not enough fuel, therefore not enough boost.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked