I've read thru several of the ALDA threads and tried adjusting mine in my 84 300SD. The cap had been removed previously by??? I was able to back the screw out another couple of turns till it would not turn any more. The low end power was better but there was no smoke under heavy load. The only black smoke tha can be seen is when you blip the throttle as the rpm snaps back there is a little puff of black.

As well I've read that my 0-60mph times should be close to 11s. Before I adjusted the ALDA they were high 17s. After, despite the better response in the low range, the times were still high 17s. New fuel filters and a rebuilt lift pump as well as a new idle rack bolt.

Any ideas from the experts?