ALDA question

[yelorsirhc]

85 300d 245k.

Both fuel filters brand new.
Recently adjusted valves.
Fresh oil change.

I have read to adjust the ALDA you back of the lock nut then unscrew the screw counter-clockwise until you get just a puff of black smoke on take off.

My adjustment screw is all the way backed out and still no sign of black smoke on mashing it upon takeoff.

Just looking for a little more scoot off the line.

[jay_bob]

Follow the hose from the ALDA around to the port on the intake manifold. There is a banjo bolt that ties the pressure sensing hose into the manifold. Remove the banjo bolt and clean it out with brake spray.

Then take the line off the ALDA and blast it out with brake spray.

Chances are this line is stopped up and preventing the manifold pressure from getting to the ALDA to activate it.

When your turbo makes boost, you need more fuel.
If your ALDA line is stopped up, you won't get the extra fuel.
When you don't get your extra fuel, your car goes slow.

If you over-adjust the ALDA you will get too much fuel - black smoke on acceleration. Thus the advice to tweak it to get just a little puff.

[Dan Stokes]

He was great as Hawkeye on M.A.S.H.

(All the old guys will get the reference).

Dan

[yelorsirhc]

Originally Posted by jay_bob

Follow the hose from the ALDA around to the port on the intake manifold. There is a banjo bolt that ties the pressure sensing hose into the manifold. Remove the banjo bolt and clean it out with brake spray.

Then take the line off the ALDA and blast it out with brake spray.

Chances are this line is stopped up and preventing the manifold pressure from getting to the ALDA to activate it.

When your turbo makes boost, you need more fuel.
If your ALDA line is stopped up, you won't get the extra fuel.
When you don't get your extra fuel, your car goes slow.

If you over-adjust the ALDA you will get too much fuel - black smoke on acceleration. Thus the advice to tweak it to get just a little puff.

I cleaned the banjo bolt at the same time I did the valves. Anyway the car is zippy enough on the interstate. As I understand it the ALDA allows more fuel as boost increases but this doesn't matter from a stand still as there is no boost pressure. The point I was making is with the ALDA screw backed out all the way I can't get any smoke from a stand still.

[Rogviler]

I have the same thing with my 300TD- ALDA screw backed all the way out, banjo bolt/tube cleaned, no smoke. Night and day difference from where it was when I bought it (almost had an accident due to no acceleration), but it still doesn't feel like it's perfect. I'm sure there's a specific component involved. Dirty injectors? Tank screen? I'll be addressing a list of things in the spring/summer, so I'll report back if nobody else weighs in.

-Rog

[whunter]

Originally Posted by yelorsirhc

85 300d 245k.

Both fuel filters brand new.
Recently adjusted valves.
Fresh oil change.

I have read to adjust the ALDA you back of the lock nut then unscrew the screw counter-clockwise until you get just a puff of black smoke on take off.

My adjustment screw is all the way backed out and still no sign of black smoke on mashing it upon takeoff.

Just looking for a little more scoot off the line.

I suggest you study these threads
http://www.peachparts.com/shopforum/diesel-discussion/239597-alda-issue-threads.html

.

[scottmcphee]

Always, start working on alda issues by removing the alda from the car. Loosen the big nut (its counter-intuitive as to which way you turn it) then lift the alda off the IP.

Forget about cleaning tubes and banjos... Etc. Just take the alda off.

If this solves your issue, you are done. Leave it off. Enjoy your black smoke if you press the pedal too hard, or if you don't enjoy black smoke don't press the pedal too hard.

It is really that simple. The only real purpose of the alda is to prevent the embarrassment of MB cars from making black smoke. But black smoke is in vogue from diesels these days. So update your look!