Just had the valves adjusted and was checking my blow by situation/futzing around under the hood and noticed this bit I am pointing to on the IP seems to be missing a vacuum line maybe? Or is it just meant to look like it should have something plug in?

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No that is the ADA....It is a vent line....Suppose to be open...

If your up to "go to the darkside" you can remove it to allow more horsepower! But then I would also recommend removing the EGR as well....

Removing an ADA from a NA 300D

You may also want to change out, your hand primer pump to the new style...


Here's my payback! Diesel Primer Pump Replacement

The cigar hose, also looks like it is about to burst...will make a mess..

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What you're pointing to is the ADA. It's an aneroid capsule that adjusts the maximum fuel that can be delivered based on the altitude that the car is at. As the elevation increases, air density decreases and there is less Oxygen present in the cylinder. Injecting more fuel than the air in the cylinder can burn will only increase EGTs and cause smoke and soot buildup. Removing the ADA is not recommended and will only cause the problems described above.

The nipple is to be left open as it is how the capsule senses the atmospheric pressure.

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'84 190D 2.2 5MT (Red/Palomino) Current car. Love it!
'85 190D 2.2 Auto *Cali* (Blue/Blue) *sold*
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Mystery solved- Thanks for the info and input on the cigar hose, didn't realize it was looking imminent... will order a new one along with the pump in my next batch of 240 stuff. I may do the egr removal in the future but am just happy just to have the car remain in motion!

NO hunny....Your dreaming again....



Look at the diagram, it controls the stop lever rod....It has no way to control fuel injection, it simply keeps you from being able to have fuel control of the throttle/gas/go peddle...

Euro cars, that came with a type M injection pump had no such device and well it doesn't cause any of those issues you are referring...It will cause a black cloud issue "if" your climbing at altitude....but I haven't even noticed that on either of the cars...with or with out the ada...

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how did you get all of your linkages so brassy looking?

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1981 NA 300D 310k miles

*You're

Jason, the stop lever directly affects the fuel rack. Look at this Dieselmeken video. Goran uses the stop lever to construct an ALDA. https://www.youtube.com/watch?app=desktop&persist_app=1&v=IB0EuSzn8JI The ADA restricts rack travel in response to altitude above sea level. Removing it does nothing but cause problems.

The M pumps on the W123 cars might not have had one, but the M pumps on the newer W124 and W201 cars DID because it was an improvement added by MB to prevent smoke and soot buildup at high altitudes.

You're incorrect. Perhaps a better understanding of the injection pump is in order before suggesting a potentially dangerous modification. You also juxtipose that suggestion with the illegal suggestion of deleting the EGR. That speaks volumes in and of itself.

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'84 190D 2.2 5MT (Red/Palomino) Current car. Love it!
'85 190D 2.2 Auto *Cali* (Blue/Blue) *sold*
http://badges.fuelly.com/images/sig-us/302601.png
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Good question, prop meant to fool the buyer! It's new to me and was originally from Utah, it was given to a no kill shelter by an older lady who has passed on. With that, all the records of who did what have gone awol, so it has been a discovery of sorts lining up the typical maintenance list of things to get done. Despite the shiny, she inherited some blow by so I have been pouring thru the archives on potentially sticky rings. Hoping that with a little love, frequent synthetic oil changes and maybe some Marvel Mystery Oil in the oil, or cylinders, the blow by subsides over time. A lot of wishful thinking going on.. But drives fine and has good starts, decent pickup for a land snail 240- Who could ask for more?

Sounds like it was loved. It's best kept stock if you want to keep it looking proper and maintain its value.

The best cure for stuck rings is as you said; removal of the injectors and a dose of MMO in the cylinders. Leave it to sit for a day and dose the engine every day for a few days, then change the oil, replace the crush washers with new ones, and reinstall the injectors. If they're stuck, that'll help. If they're just worn, it won't.

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'84 190D 2.2 5MT (Red/Palomino) Current car. Love it!
'85 190D 2.2 Auto *Cali* (Blue/Blue) *sold*
http://badges.fuelly.com/images/sig-us/302601.png
http://i959.photobucket.com/albums/a...0/sideview.png

Your getting all screwed up....again....

I am not going to feed your fire.....

My advice before making advice on what is "bad".....Read the manuals that the factory put out.....Look at this, explains EXACTLY how it works...

http://www.benzworld.org/forums/attachments/w123-e-ce-d-cd-td/309724d1274616623-whats-adjusting-screw-top-injector-pump-alda-240-07-225.pdf

It DOES NOT control the fuel rack, it controls the fuel path...two different things....It is NOT illegal to remove the device as it has NOTHING to do with smog and your not going to end up in prison for removing it...

It is NOT dangerous to remove as it just allows the user to have fuel control of the throttle....

You have fun believing what YOU want....

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Thanks again for the info, the level of detail you guys know about these old beasts is surprising.....

No problem! I found my euro years ago, I remember helping my grandmother's neighbor change the battery in it when I was younger and when fuel prices started climbing. I wanted to get a better car that got better mpg then my v8 dart, I figured hey let me ask about it and well with out even the exchange of money....I was pushing it over to my grandma's house...Soon after that I made a vow that I wouldn't own another car and then I had to learn how to drive a stick! Then I couldn't own so mechanically interesting with out getting knee deep in the mechanics. Then in 2012, I wanted to find an automatic and thus I found the 78 behind a vw garage with its injection pump removed....That started me pushed me even deeper into the rabbit hole! They are great cars but take a lot of knowledge, researching, tinker and time to get to know.

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Are you sure? More fuel than the air charge can burn will lower combustion temps.

Sixto
83 300D

Not inside a diesel engine. More fuel than air in a diesel makes higher EGTs. The same in a gas engine lowers them.
EGT - About Exhaust Gas Temperatures

__________________
'84 190D 2.2 5MT (Red/Palomino) Current car. Love it!
'85 190D 2.2 Auto *Cali* (Blue/Blue) *sold*
http://badges.fuelly.com/images/sig-us/302601.png
http://i959.photobucket.com/albums/a...0/sideview.png

Again, *you're

Look, your PDF describes exactly how I explained the device works. It reduces the amount of fuel injected. How does changing the fuel "path" occur exactly? The fuel only has two ways to go, either into the cylinder or back to the tank.

It is illegal to remove or tamper with the EGR valve, which you suggested doing right after you suggested removing the ADA.

I will continue believing what is correct, and I will have to continue following your posts with disclaimers and info for the individuals who are unfortinately on the receiving end of your keyboard. It's because of the fear that new owners might actually damage their vehicles by following bad advice from some members on here that I can't put anybody on my ignore list in good conscience.

__________________
'84 190D 2.2 5MT (Red/Palomino) Current car. Love it!
'85 190D 2.2 Auto *Cali* (Blue/Blue) *sold*
http://badges.fuelly.com/images/sig-us/302601.png
http://i959.photobucket.com/albums/a...0/sideview.png