Just you wait till you REMOVE it

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RIP: 80 300SD
RIP: 79 450SEL
2002 E430 4matic (212,000km)
2002 ML500 'sport'

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FACEBOOK: PANZER450

I adjusted my ALDA on my 617 as per postings. No difference. Then I removed the ALDA per postings. Very small improvement in 0 - 10MPH. But engine now it is very "flat" from 3000 RPMs up and MPG fell almost by 2. Minimal extra smoke. Reinstalled ALDA. ALDA will not tighten and oil leaks from the ALDA, fast. Discovered that turning ALDA with its mounting bolt does tighten and fix the oil leak.

My engine has 135k miles and looks to be dealer maintained. ALDA still had the sealed adjustment, banjo bolt was clean, turbo kicks in with a desire to wind up to 5000 RPM.
I am trying to say, do not just take the ALDA off or over adjust as it can make things worse. I also have a 300SDL that does not need the extra low end, so I know it does not have to have as much "turbo lag".
So check your banjo bolt, bypass the switchover valve(temporary), make small adjustments to the ALDA but do not remove it.

Why do you think it leaks oil when it is half on but not when it is removed? Why does a slip connection tighten something instead of just slipping? Why does the added fuel kick at low rpm cause the engine to starve for fuel at the upper end? We need more information.

Greg

Because you have problems with your injection pump. Something is worn/out of adjustment inside. The shaft should NOT leak ANY oil. Adjusting/removing the ALDA should have 0 (zero) effect on a loaded engine above 3000rpm.

Sounds like your IP needs to be rebuilt.

Removing my ALDA really woke up my engine, and I don't have any oil leaking..was a dog off the line now it's just not quite so much a dog.
the pull in 2nd gear right thru to 4th gear is astounding! even with a nasty 2-3 flare I'm still going to guess that my 0-100Kmh has dropped from 18 to at least 10...crazy...I'll try to get a G-tech in her this week and see what that says...

__________________
RIP: 80 300SD
RIP: 79 450SEL
2002 E430 4matic (212,000km)
2002 ML500 'sport'

____________________________
FACEBOOK: PANZER450

It makes a difference, but not THAT much. I'd bet you are in the ~15-16sec range.

My guess = with the ALDA off the plunger is forced up by a spring. Maybe this acts as a seal. With the ALDA in place there is a preload on the plunger that breaks the seal allowing oil into the space between the IP and the ALDA. I don't know if it's normal for oil to get into that space.

Could this be a perception issue? Lag makes the upper end come in more dramatically which might give the perception of having more authority. You'd have to compare 3000-limit rpm runs on a dyno to know for sure.

Could also be a load issue. With no ALDA you might get to 3000 rpm with less pedal input. I don't know what the IP does with the load/pedal position input.

It might be worth checking if the ALDA retracts enough at max boost to fully relax the IP plunger.

Sixto
93 300SD

I heard the preception theroy before I even adjusted it the first time. Twice I have put it back to the original settings and found that to be the best setting. I do think my oil leak has something to do with loading pressure on the shaft or the tightning by spinning the partial installed ALDA that was required.

I know that everyone says the ALDA does not effect the upper range but in stock trim my car (300D) takes off at less than 2000 RPM and does not stop climbing untill 4800 RPM. That is like a 2-3 second turbo lag but still 0-60 in less than 13 seconds. This is more fun than my 300sdl because you always put the peddel to the metal, trans always winds 2nd gear to the the max (?) and I still get 24 MPG and unlimited smiles per gallon.

I think the cars that remove the ALDA without creating smoke, are the ones with IP wear. My car runs too strong to have much wrong with it. The 300sdl has no turbo lag but you never give it much throttle and the shift quality suffers from too much vacuum.