The procedure(s) I have for tweaking ALDA contain reference(s) to things like for looking for slight puff of black smoke as an indicator. Look here for one such procedure.

What I've accomplished thus far regarding cleaning out banjo fittings, pressure lines, and actual ALDA adjustment have produced results that are nothing short of ASTOUNDING!

Having said that, are there any more precise ways of knowing when you've got fuel enrichment where it optimally should be other than seat-of-the-pants methods like this and drive tests?

Thanks!

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-Ken Harris
1984 Mercedes 300SD
2001 VW Passat 1.8T
2004 Harley Davidson FLHRSI
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Der Dieselfanatiker