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> Bulkhead In Fuel Tank?, Where the access is to get ti the fuel pump.
testrat
post Jan 5 2021, 07:02 PM
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Posts: 12
Joined: 1-December 11
Member No.: 99,245
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Location: NE Okla, USA
Drives: 1990 740 GL



This - bulkhead? I will call it, for lack of knowing what else to call it - the part that gives you access to the fuel pump.. Anyway, as can see on one of the pics, a wire is off on the inside. Shop has tried to solder/repair, but dont stay fixed. Fuel pump wont stay working. Or the fuel gauge. So, does anyone have this item? Haven't been able to find around here locally (NE Okla). Or thru some on line auto parts sites.
... Failing that... I am wondering IF I can drill thru this molding that seal the wires going thru it, just a bit undersize - 1/16", and heat some 1/16 TIG Stainless Steel welding wire, and melt thru it, then IT would reseal once cooled? Then can solder the wires onto that? If you follow my thoughts?
... IF... anyone happens to have, please notice in the one pic, the threaded port for the fuel line to connect is needed. The one that was found, this port wasnt threaded, or was different in some way, so stated the shop that is working on it. Thou, maybe, I can modify the fuel line to adapt to this -bulkhead- with a different connection here. Just was hoping to NOT need to modify if possible...
.
Thanks for any thoughts or help.

I accidentally posted in the 240 area - IF happened to see this there..
IS a 740 GL car..
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highvoltj
post Jan 5 2021, 07:33 PM
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Location: Bay Area, Northern California
Drives: 1990 Volvo 740 GLE



Okay....I am assuming that you are having intermittent fuel delivery issue's and have determined that it is the fuel pump....this may very well not be the problem and I will tell you what I endured while having the same issue with my girlfriend's son's car....the very same year, make and model. The car would start and run okay and then just randomly shut down due to lack of fuel. They took the car to a shop on multiple occasion's but could never duplicate the problem, so me being an accomplished automotive mechanic and having the ability to diagnose and fix most problems, decided to give it a go! I changed the fuel filter, removed and cleaned the fuel rail to remove any obstructions, and still the car would randomly shut down....In a nutshell, the problem turned out to be a faulty fuel pump relay which is located under the center console behind the ash tray....after replacing that, the car never missed a beat!
Hope this helps!
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testrat
post Jan 7 2021, 01:19 PM
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Group: Members
Posts: 12
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Location: NE Okla, USA
Drives: 1990 740 GL



QUOTE (highvoltj @ Jan 5 2021, 06:33 PM)
Okay....I am assuming that you are having intermittent fuel delivery issue's and have determined that it is the fuel pump....this may very well not be the problem and I will tell you what I endured while having the same issue with my girlfriend's son's car....the very same year, make and model. The car would start and run okay and then just randomly shut down due to lack of fuel. They took the car to a shop on multiple occasion's but could never duplicate the problem, so me being an accomplished automotive mechanic and having the ability to diagnose and fix most problems, decided to give it a go! I changed the fuel filter, removed and cleaned the fuel rail to remove any obstructions, and still the car would randomly shut down....In a nutshell, the problem turned out to be a faulty fuel pump relay which is located under the center console behind the ash tray....after replacing that, the car never missed a beat!
Hope this helps!


If you look at the pics, the 3rd on I think, you can see the GREY wire is disconnected (fuel gauge-which is why it quit working), but the RED wire runs the fuel pump. IF one will wiggle that wire where it goes into the PLASTIC, the pump will go off and on.. So, the issue in the connections in the plastic that seals the wired going thur the bulkhead, if you follow me. SO, I need that whole item. Or, I guess I will need to find a way - stated in my original post yo try and fix. But yes, have had to also replace the relay once too.
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