It should be one of the following issues.


* If you filled the fuel tank today, possible BAD fuel. 2 stroke oil and/or Diesel911 may cure this.

Diesel owners need to know fuel data
Diesel owners need to know fuel data - PeachParts Mercedes ShopForum

Warning ALL Diesel Owners
http://www.peachparts.com/shopforum/diesel-discussion/309367-warning-all-diesel-owners.html#post2841158


* Plugged fuel tank strainer. Bad fuel or infestation..

Algae/Fungus fixation...
Algae/Fungus fixation... - PeachParts Mercedes ShopForum

Biobor, what is it, why do I need it???
Biobor, what is it, why do I need it??? - PeachParts Mercedes ShopForum

Filters, Fungus, Biocide, etc.
Filters, Fungus, Biocide, etc. - PeachParts Mercedes ShopForum

Algae Clogged Filter Pic StarTron WORKS !
Algae Clogged Filter Pic StarTron WORKS ! - PeachParts Mercedes ShopForum

Changing the Fuel Tank Strainer on a Mercedes Diesel
Episode 1: Changing the Fuel Tank Strainer on a Mercedes Diesel - YouTube

Check out this fuel pickup screen
Check out this fuel pickup screen - PeachParts Mercedes ShopForum

W123 Fuel Tank Screen Replacement
W123 Fuel Tank Screen Replacement - PeachParts Mercedes ShopForum


* Massive air leak into the fuel system. The fuel thermostat plastic end O-ring leaking is a common issue.

Braided fuel lines weep. 1984 300TD turbo
Braided fuel lines weep. 1984 300TD turbo - PeachParts Mercedes ShopForum

http://www.peachparts.com/shopforum/mercedes-parts-reference-library/235091-om601-602-603-diesel-fuel-thermostat-rebuild-parts-list.html

* Massive vacuum in the fuel tank. A bad vent valve will do this, remove the filler cap and test drive.

What is this valve and why is it dripping diesel?
http://www.peachparts.com/shopforum/diesel-discussion/317902-what-valve-why-dripping-diesel.html

Fuel tank vent pictures + location
http://www.peachparts.com/shopforum/2878700-post39.html

What happens when a tank vent gets clogged.
What happens when a tank vent gets clogged. - PeachParts Mercedes ShopForum

Imploded fuel tank - so sad!
http://www.peachparts.com/shopforum/diesel-discussion/314457-imploded-fuel-tank-so-sad.html

Why do I have vacuum in my diesel tank.....................?
Why do I have vacuum in my diesel tank.....................? - PeachParts Mercedes ShopForum


* Fuel bypass valve failure.

http://www.peachparts.com/shopforum/mercedes-parts-reference-library/247163-6010700146-diesel-fuel-return-valve-banjo-bolt.html


* A broken steel injector line.

http://www.peachparts.com/shopforum/mercedes-parts-reference-library/328796-om602-962-steel-injector-lines-w124-128-300d-turbo-1990-1993-a.html


* Lift pump failure. Test output volume.

Lift pump
MB# 0000902650


* Injection pump delivery valve seal failure.

http://www.peachparts.com/shopforum/general-information/173991-om60_series-ip-delivery-valve-reseal.html



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__________________
ASE Master Mechanic

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D

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