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Johns
12-26-2016, 11:50 AM
It's been awhile since I've posted on here but I was recently stranded at a parking lot after my B5 didn't want to start.

It turns over and the battery shows good voltage (hooked up to a charger) but I don't hear the fuel pump priming. I removed the relay and cleaned the contacts then installed the relay without the cover and manually engaged the relay with the ignition in the accessory position. All I am getting is a faint click from the fuel pump.

I also tried hitting the bottom of the fuel tank as suggested by Devon but that did not prove to be helpful.

Is there anything else I can try? Or is it safe to say I should be ordering a new fuel pump..

Avant Nate
12-26-2016, 12:35 PM
You can also pull off the fuel pump access panel and make sure you are getting good voltage to the pump.

Seerlah
12-26-2016, 02:51 PM
Check the fuel pump fuse too. The click heard may be a placebo thing, meaning you just want to hear it and it really isn't there (ie "faint" click).

Johns
12-26-2016, 09:19 PM
Check the fuel pump fuse too. The click heard may be a placebo thing, meaning you just want to hear it and it really isn't there (ie "faint" click).

Fuse is good and I can test the pump for voltage tomorrow. In the meantime, are my only replacement options >$100?

Avant Nate
12-26-2016, 09:42 PM
Walbro 255
https://www.amazon.com/Walbro-GSS342-Fuel-Pump/dp/B000EVN7W8

Johns
12-27-2016, 10:21 AM
Walbro 255
https://www.amazon.com/Walbro-GSS342-Fuel-Pump/dp/B000EVN7W8

Plug and play?

Johns
12-27-2016, 04:28 PM
I also have a pump from an '01 GLX Wagon that I replaced thinking it was bad but turned out to be fine. Any chance that would be useful?

Avant Nate
12-27-2016, 11:13 PM
Plug and play?

You need the install kit as well. I ran that pump for a while, and when my allroad pump died, I put it in there. Now I have a walbro 450.
Fits right into the stock basket, might need some orings to secure it.

Johns
12-28-2016, 06:03 AM
You need the install kit as well. I ran that pump for a while, and when my allroad pump died, I put it in there. Now I have a walbro 450.
Fits right into the stock basket, might need some orings to secure it.

Can't seem to find any kits anywhere, have a link?

Davdraco1
12-28-2016, 07:49 AM
What are symptoms of not getting enough fuel?

Seerlah
12-28-2016, 09:23 AM
I also suggest you confirming you need a new pump. Start with checking voltage to the tank lid. After that, all diagnosis will need to be done from components inside the tank, assuming you really have no fuel.


Can't seem to find any kits anywhere, have a link?

If you indeed require a pump:

Amazon link for the Walbro GSS340: https://www.amazon.com/Walbro-GSS340-Fuel-Pump/dp/B002ERGI7Q/ref=sr_1_cc_1?s=aps&ie=UTF8&qid=1482943759&vehicle=2001-73-987-20--1-6-6-7585-2306-1-1---2-0&sr=1-1-catcorr&ymm=2001%3Aaudi%3Aa4+quattro&keywords=walbro+gss340

I personally have a Walbro GSS340 setup at my house in basket as a back up (044 in tank), and picked up the rest of the install parts from here. Pick up the smaller sock filter, can't recall what sized sleeve, the Crystler in-tank line will suffice if you don't want to pick up the black flex hose or reuse your old one.

http://www.autoperformanceengineering.com/html/kits.html

Then for clamps, I picked up assorted GEMI brand rolled edge ones and have assorted sizes in my garage. May be a good time to stock up. Beats the crap out of the one sized fuel injection hose clamps. these can be used on various sizes vs something like only 5/16".

http://www.germanautoparts.com/Mercedes/1964/3169/12/11573/0

One stop shop for our cars come close when it comes to complete kits, but not sure if you should trust them or not. Meaning, some parts may work no problem and some may cause fitment issues. Or you simply may be missing something that you need to make it work. The above will get the job done. Know you will also need to dremel the bottom of the basket that holds the pump larger, for the pump inlet to fit. Not a big deal. Getting the pump out the tank and back in will be. So, you have been forewarned. Here is a tip. The basket can only be placed back into the tank one way. Meaning the locking grooves are not symmetrical and will only seat back into the tank one way, in case you run into difficulties (most likely the reason it won't lock into place).

Johns
12-28-2016, 04:55 PM
If you indeed require a pump

Thanks a ton man

Avant Nate
12-28-2016, 05:31 PM
You can find the install kit on the Amazon pages. I may have been wrong on my first link, can't remember if I have the GSS340 or the GSS342. I think the only real difference between the two is the aperture of the inlet.

Here's the install fit for the GSS340 which Seerlah linked to: https://www.amazon.com/Walbro-400-812-Fuel-Pump-Installation/dp/B000EDCQKK/ref=pd_bxgy_263_img_2?_encoding=UTF8&pd_rd_i=B000EDCQKK&pd_rd_r=YGZEQS3KJJ993AH8Y9X9&pd_rd_w=41aQT&pd_rd_wg=1Wukr&psc=1&refRID=YGZEQS3KJJ993AH8Y9X9

the two main things you need are the wiring pigtail and the sock. The install kit I had or my 255 had a foam sleeve that secures it in the basket, and I transferred that over to my allroad. For the 450, i used n-butyl o-rings. The walbro pump is slightly skinnier than stock.

And check the power at the pump, it takes like 10-15minutes.

Seerlah
12-28-2016, 05:39 PM
That is correct. The GSS340, GSS341, and GSS342 are all Wlabro 255 pumps. The differences between them are the bottom inlets. The GSS340 is centered, and what I would suggest. If you ever plan on converting to E85 this may be a good time to install an E85 compatible pump, which the 255 is not.

And your welcome! That is what we are here for [cool]