82 300SD Black smoke - Mercedes-Benz Forum

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 05-04-2010, 05:59 PM Thread Starter
BenzWorld Member
Early80s's Avatar
Date registered: Mar 2010
Vehicle: 1995 C280
Posts: 50
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
82 300SD Black smoke

My 82 300SD was serviced recently which included new filters (air and gas), valve adjustment, oil change, etc. It has only 135K miles and runs well. The mechanic said he "turned up the pump a bit" to get more power out of the engine for me, and it moves pretty well, but soot is starting to build on the rear bumper now (never had that before) and I notice a small cloud of smoke trailing me when I accelerate (black smoke). It also smells pretty toxic, even at idle. I want to be able to reverse what was done to "turn up the pump" and lean out the mixture if possible so it doesn't smoke. I have read that the ADLA adjustment can make the engine run rich and smoke, but I verified the ADLA has not been messed with (original cap is still in place). Is there some other adjustment that would cause it to run too rich and smoke?
Early80s is offline  
Sponsored Links
post #2 of 2 (permalink) Old 05-05-2010, 04:34 AM
BenzWorld Elite
Govert70227's Avatar
Date registered: Oct 2009
Vehicle: 2000 VW Golf Variant
Location: Leiden, Netherlands
Posts: 2,952
Mentioned: 0 Post(s)
Quoted: 4 Post(s)
The full-load screw could have been adjusted.

The timing could have been adjusted.

Or the internal linkage of the governor of the pump could have been adjusted.

The mixture on a diesel is always lean, except under full-load conditions.

Last edited by Govert70227; 05-05-2010 at 05:59 AM. Reason: info added
Govert70227 is offline  
Sponsored Links

  Mercedes-Benz Forum > General Mercedes-Benz Forums > Vintage Mercedes-Benz

Quick Reply

Register Now

In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode

    Similar Threads
    Topic Author Forum Replies Last Post
    300SD White Smoke DieselBenzCanada W126 S,SE,SEC,SEL,SD,SDL Class 2 07-31-2010 11:11 AM
    Too much black smoke! HELP!!! kurtept W123 E,CE,D,CD,TD,TE Class 17 09-15-2009 05:24 PM
    1985 500sl Black smoke and a black substance YLIANADIAZ R/C107 SL/SLC Class 5 09-14-2008 02:25 AM
    black smoke ? sebster1 W202 C-Class 1 06-30-2008 12:48 PM
    Smoke in cabin of 300SD? 240DieselPower W126 S,SE,SEC,SEL,SD,SDL Class 1 09-27-2007 05:30 PM

    Posting Rules  
    You may post new threads
    You may post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On


    Title goes here

    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome