I got my ass kicked trying to get to the bottom of an intermittant performance problem, went through all the usuals, so I took it to a mechanic in the area that I only use when I don't want to do the work, which isn't very often. He tried to adjust the ALDA, and the setscrew and locknut both fell off. Luckily I had two virgin spares in the trunk, with shims.

Shazam! Car's got more power than I ever knew possible, with no more smoke than before. So- if you've tried it all, and you think your ALDA works because the screw ain't broke off, well it just might be leaky anyways. It pays to test. I am now convinced that I have been living with a leaky ALDA the entire 4 years that I've owned the car. The car hauls ass now.

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'02 BMW 325i
'85 300D 450k
'93 190E 2.6 170k(killed by tree)
'08 Ducati Hypermotard 1100S 6k
'06 Ducati S2R800 14k(sold)