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Old 05-29-2010, 11:00 AM
rostapher16 rostapher16 is offline
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Join Date: Aug 2009
Location: Athens, GA
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Default Fuel Sending Unit "repair"

Hopefully this is right section to put this in...

I just found out today that my fuel gauge actually does work! It's just the sending unit that is the problem. I had already tested it once and it seemed to be working properly, but apparently not.

I took it out and took it apart and it is extremely simple. The top strip is the resistant strip and apparently it has lost its resistance. Anyone know how I might be able to repair this one (ie. add resistance). It's a shot in the dark, but I thought someone might have an idea.

I don't know how much they are but I'm sure it's not cheap.
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1983 760 GLE D24T M46
2005 Bajaj Chetak
2002 VW Golf 2.0 Gasser
1972 VW Beetle 1600 standard
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Old 01-17-2011, 04:16 PM
nick nick is offline
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There are two sending units that are wired in series. The second sending unit is in the second tank under the car. The Fix
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  #3  
Old 03-01-2011, 12:07 AM
v8volvo v8volvo is offline
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Vehicle: '86 745, '83 764
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Neat writeup and clever fix!

Interesting Volvo Diesel trivia fact: the dual-tank setup only came on very early 760 TD sedans. The early gasser V6 760s didn't have the upper tank (the one mounted in the trunk, above the rear axle just behind the seat), and neither did the diesels from '85-on. They only had the tank underneath the floor, and of course that was all the wagons ever had as well. It was only on the '83-'84 764 TD sedans that you could get the extra tank, which gave the cars almost 20 gallons of total fuel capacity! Volvo must have meant the diesels to be real long-distance cruisers, since with 20 gallons on board and 30 mpg hwy they have a range of 600+ miles on a single fill-up.

Only drawbacks are you don't get the rear-seat ski pass-through flap because the upper tank blocks it, and you lose a little bit of trunk capacity. The range is nice, though... When I drove my '83 764 TD from Seattle to the SF Bay Area and back last summer, I only had to fill up twice!
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