fuel tank strainer - PeachParts Mercedes-Benz Forum

funola · #1 10-15-2012, 11:52 PM

Quote:

Originally Posted by pnolet

hi hopes this finds everyone doing well. so I am finally replacing the tank strainer today on my 99 e300 td. i got it out expecting a major blockage, and besides some black there was nothing that seemed to block it. im at a loss, my car dies at about 1/4 tank, nails loud, and has terrible turbo lag, Ive done almost everything you can name to the fuel system, where should i go now? im thinking maybe a cracked line in the tank so when it gets to 1/4 all it gets is air? Ive got the strainer out AND ALL ACCESS TO THE TANK SO I WANT TO FIGURE EVERYTHING OUT BEFORE I PUT IT ALL BACK TOGETHER PUT Diesel in and than have to redrain a whole quarter tank. please give me some guidance on where to go next specifically with the tank??

Is the tank vent venting or is it blocked?

I would test the supply line under the car with a Mityvac to make sure it holds vacuum. If it is a metal line like the W123's, it is prone to rust and develop pinhole leaks which introduces air at low tank levels.

pnolet · #2 11-14-2012, 09:08 PM

Quote:

Originally Posted by funola

Is the tank vent venting or is it blocked?

I would test the supply line under the car with a Mityvac to make sure it holds vacuum. If it is a metal line like the W123's, it is prone to rust and develop pinhole leaks which introduces air at low tank levels.

How exactly do I check this?.

funola · #3 11-14-2012, 11:18 PM

Quote:

Originally Posted by pnolet

How exactly do I check this?.

In my post above, link to another thread, I describes how (near the end).

pnolet · #4 11-15-2012, 12:14 AM

Mine is a 99 is there anyway besides visual inspection (if that fails) to maybe test if the fuel line has a leak. Why would it only do this on 1/4 tank or lower

funola · #5 11-15-2012, 12:49 AM

Quote:

Originally Posted by pnolet

Mine is a 99 is there anyway besides visual inspection (if that fails) to maybe test if the fuel line has a leak. Why would it only do this on 1/4 tank or lower

Does your 99 have metal fuel lines that can rust? Full tank would put more pressure in the fuel line than 1/4 tank thus less air coming in via the pinhole..

You can try and Mityvac but the results may not be conclusive since the pinhole can be very small.

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whunter · #6 11-15-2012, 12:51 AM

Quote:

Originally Posted by pnolet

Mine is a 99 is there anyway besides visual inspection (if that fails) to maybe test if the fuel line has a leak. Why would it only do this on 1/4 tank or lower

I will try to lay out a full diagnostic of the fuel system.
Each post will cover one issue.
FYI: The fuel sender has been superseded four times, and alternative level verification may be needed.
The current part is MB# 2105424017

* You have replaced the fuel tank Screen.

FYI
MB diesel filtration, how it works.
MB diesel filtration, how it works. - PeachParts Mercedes ShopForum

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whunter · #7 11-15-2012, 12:52 AM

What is this valve and why is it dripping diesel?
What is this valve and why is it dripping diesel?

Fuel tank vent pictures + location
93 300D 2.5L Turbodiesel Power Loss

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

Imploded fuel tank - so sad!
Imploded fuel tank - so sad!

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

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whunter · #8 11-15-2012, 01:21 AM

These include the injection pump.

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