I have been reading about removing the alda... I noticed today that my car was extremely sluggish until the turbo would kick in.. I could barely keep up with the pace of traffic unless i kicked the tranny down one gear... It doesn't even want to pick up speed from a light which can be dangerous getting on a freeway... I just replaced the exhaust gasket and installed a used turbo that seemed to be in better shape than my own... Is this going to restore my low end power back.... I cleaned out my banjo bolt as instructed but that was before my cars first passed due valve job and saw a giant cloud of black soot stream out of the back when i would take off at a lights... the black smoke only lasted about 10 lights then went away.... could this of clogged my lines again.... or should i just remove it and enjoy lots of smoke

just unbolt it and see if it makes a difference but don't remove it completely

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual

The Alda is what gives the engine the extra fuel it needs when the turbo starts blowing. How would removing it fix anything????

Start by checking if there is a leak on the hose going to the Alda or if the Alda or fuel rail is sticking.

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600SEL '91
300E 4Matic '88
240D '83
280SE '77
350SE '73
The most complex systems can fail in the simplest way.
Contra verbosus noli contendere verbis, sermo datur cunctis, animi sapientia paucis.

i don't believe in the lord! He's never bought me a Mercedes Benz.

The ALDA limits the fuel below the point where the turbo provides boost. Removing it allows the rack to move independent of boost and strictly dependent on the driver.

from what ive read is that all you get is more unburnt black smoke from a light when you accelerate.... What is the test procedure to test my current unit... My screw head on the top is broken in half and not sure if it can still be turned or not...

Test procedure with a functioning ALDA unit is to adjust the screw in 1/4 turn increments until you just see a bit of black smoke at WOT while in neutral. If you currently do not see black smoke while running, you could take off the ALDA and see if you get smoke at any point. If you don’t then you aren’t getting any unburned fuel and you shouldn’t have to put it back on.

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1982 300TDT
1991 190D
2022 Metris

i am getting no smoke at all.... Can i just unplug the vacuum line to remove it from being used or do i need to unbolt it from the top of the ip... sorry im new to the alda concept....

Do one or two 0-60 times............preferably one in each direction.

If the time is between 12 and 14.5 seconds, the ALDA is functioning adequately. I could still be adjusted for more fuel if the screw will rotate WITHOUT fracturing it.

It's not a vacuum line...........it's a boost pressure line.

Unplugging it guarantees that it will not see any boost and the vehicle should then show 0-60 times in the 20 second range.

You could make two tests for 0-60 times. One with the pressure line connected..............one with it disconnected. There should be a very significant difference.

Tee in a boost guage right at the injection pump and drive the car. If you do not see 9-10PSI, there is most likely a clog in the overboost protection circuit. My '83 300D runs great with all stock components, and the exhaust is invisible during the day.

I think you're better off fixing the real problem as opposed to trying to re-engineer a very carefully designed system.

thanks for the help... I was able to adjust the screw still and turned it only a quarter turn ccw. I then cleaned my liners and banjos... 0-60 Went from 22 seconds down to around 12ish... no smoke but have always seen a smoke at night in the lights of cars... that is still there. I will also be adding a turbo boost gauge tomorrow....

You're done.

The cleaning was the solution. The ALDA is working perfectly...........and any thoughts of removal were premature.

Smoke at night is typical............not a parameter for adjustment.

yep you were right even though i had cleaned it out about two months ago i guess in adjusting the valves blew all that old black soot back in there again......