Mercedes Benz repair: poor acceleration, fuel filter replacement, biobor

Question
1979 Mercedes 240D 240,000  Savannah, GA
Will no accelerate under load.  Have replace fuel filter, no change.filby

Answer
Best guess:
Air leaking into the fuel system.


Here are some links you need to read.

Run away diesel, why does it happen?
http://www.mercedesshop.com/shopforum/showthread.php?p=824840

MB diesel filtration, how it works.
http://www.mercedesshop.com/shopforum/showthread.php?p=1055075

fuel filter change
http://www.mercedesshop.com/shopforum/showthread.php?p=824006

Diesel filters, no tank strainers please.
http://www.mercedesshop.com/shopforum/showthread.php?p=1046422&posted=1

I'm baffled and at wit's end!?!?!?!?!
http://www.mercedesshop.com/shopforum/showthread.php?t=138961

Braided fuel lines weep. 1984 300TD turbo
http://www.mercedesshop.com/shopforum/showthread.php?t=158107

240D fuel tank removal and cleaning
Good for any W123 sedan.
http://www.mercedesshop.com/shopforum/showthread.php?p=813925

Check out this fuel pickup screen
http://www.mercedesshop.com/shopforum/showthread.php?t=140961

300SD Fuel Filter Replacement Instructions
http://www.mercedesshop.com/shopforum/showthread.php?t=105344

Biobor, what is it, why do I need it?
http://www.mercedesshop.com/shopforum/showthread.php?p=723857

Algae/Fungus fixation...
http://www.mercedesshop.com/shopforum/showthread.php?t=138733

Filters, Fungus, Biocide, etc.
http://www.mercedesshop.com/shopforum/showthread.php?p=823378

Algae Clogged Filter Pic StarTron WORKS !
http://www.mercedesshop.com/shopforum/showthread.php?t=138728

What makes a diesel motor 'peppy'?
http://www.mercedesshop.com/shopforum/showthread.php?p=462139

Had my injectors tested. Need input.
http://www.mercedesshop.com/shopforum/showthread.php?p=667358

Injector testing
http://www.mercedesshop.com/shopforum/showthread.php?t=131328

Injector R&R thread.
http://www.mercedesshop.com/shopforum/showthread.php?p=562320

Leak near injectors - '85 300D T
http://www.mercedesshop.com/shopforum/showthread.php?p=721444

Here's my payback! Diesel Primer Pump Replacement
http://www.mercedesshop.com/shopforum/showthread.php?t=109076

OM616/617 Injection Pump.
How to adjust the Naturaly Aspirated Injection Pump.
http://www.mercedesshop.com/shopforum/showthread.php?p=678986

Vacuum Diagrams W123 and W126 models
http://www.mercedesshop.com/shopforum/showthread.php?t=105297

Leakdown Tester and ?'s
http://www.mercedesshop.com/shopforum/showthread.php?p=999381

Part# rack dampener pin for 1985 300SD
http://www.mercedesshop.com/shopforum/showthread.php?p=858324

Adjusting the Rack Damper Bolt
http://engine.articles.mbz.org/diesel/rackbolt/

Valve adjustment OM 617 FYI.
http://www.mercedesshop.com/shopforum/showthread.php?t=107729

help with compression test
http://www.mercedesshop.com/shopforum/showthread.php?p=341579

Italian Tune up
http://www.mercedesshop.com/shopforum/showthread.php?t=84674

1982-240D-Vacuum System
http://www.mercedesshop.com/shopforum/showthread.php?t=105201