What problems in these MW injection pumps can cause constant black smoke?

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New, Used & Rebuilt Parts for Classic Mercedes

mbzparts.com

Has your ALDA device been tampered with?

Does your turbocharger make factory boost pressure?

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1981 300TD 4 speed manual
Euro bumpers, zender valance and skirts, H&R springs, billy HD's, leveled sls, real AMG Pentas 16x8 et11, vdo boost/egt gauges intergrated into ash tray, eurolights, led 3rd brake light

I don't think so, but I'm not sure.

I don't think it does. How to test?

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New, Used & Rebuilt Parts for Classic Mercedes

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This is what a non tampered with ALDA device looks like.


Here is a tampered with one.


For boost pressure the easiest way to check is to temporarily tee in a boost gauge on the boost line running between the back of the intake manifold, and the alda device.

On my car I deleted the ALDA, and took that end of the boost sensor line and ran it in through the firewall. It runs to my VDO boost gauge in my ashtray.

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1981 300TD 4 speed manual
Euro bumpers, zender valance and skirts, H&R springs, billy HD's, leveled sls, real AMG Pentas 16x8 et11, vdo boost/egt gauges intergrated into ash tray, eurolights, led 3rd brake light

I think it would help to know, which one of your cars, you are experiencing this problem with..

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Don't forget injector pop pressures and timing chain elongation (after you've checked what's been suggested above)

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Well, there's two. One is a motor from an 83 300SD (now in an 81). The other is someone's who I sold an injection pump to who is having a lot of black smoke and saying it's the pump.

The one I have has had the ALDA "tampered with".
How do I adjust it to stock?

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New, Used & Rebuilt Parts for Classic Mercedes

mbzparts.com

You have checked the air cleaner? Some are in an unbelievable poor condition. Just removing it for a short period is an okay test. That's if it looks really bad.

Basically not enough air entering the engine it is going to smoke black. Plus hurt fuel milage and power.

Chances are the injection pump wasn't put on correctly and it is out of timing on top of it...

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Of course

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New, Used & Rebuilt Parts for Classic Mercedes

mbzparts.com

Going to adjust the ALDA to fully open minus a 3/4 turn.

Wouldn't surprise me. We did the drip timing but I'm saving up to buy a timing light.

Found out that the person who bought the injection pump from me had a friend "turn up" the previous pump. He removed it to do so, so I imagine he opened it and turned up the max fuel. After that pump went back on the car started gushing huge clouds of black smoke. He assumed it was just the pump and bought one from me and is still having the same problem. I told him he probably melted his pistons or did some other serious internal engine damage from extremely high EGTs.

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New, Used & Rebuilt Parts for Classic Mercedes

mbzparts.com

If you are dealing with one of those "I'm gonna get 500HP out of this OM617" people, I suggest you distance yourself. Nothing you do will satisfy those people. His engine may very well be fried or still full of soot. He could have burnt up the turbo, too. That would create extra smoke but not at idle.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge

I don't believe you can use a timing light on these cars....I have never heard of it...

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See for example

http://www.peachparts.com/shopforum/diesel-discussion/139170-specialized-indicator-ip-timing.html

http://www.peachparts.com/shopforum/diesel-discussion/352060-my-digital-riv-timing-light-engine-testing.html

http://www.peachparts.com/shopforum/diesel-discussion/344261-dynamic-diesel-timing-renamed-thread.html

(and many others)

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

You have not mentioned if the smoke smells like Oil or Fuel?

If the smoke smells like Oil you likely have another problem.

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84 300D, 82 Volvo 244Gl Diesel