RunningTooHot

You are correct about the ALDA but an IP must have a fuel adjustment for full load fuel setting. The ALDA maim purpose is to control the smoke to an acceptable amout at all altitudes.
As for what I did, the adjustment screw was backed all the way out when I bought the car.Very little smoke. I put washers under the ALDA and still no more smoke but I got more power. When I say maxed out I mean there is not more room for washers under the aneroid. No I am just curious as to where the fuel screw is.

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Mark
82 300SD 110k
91 Caprice SS
92 Jetta TD
97 Cadillac Concours(300hp)
84 Celebrity 4.3L diesel