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98 V70 GLT Fuel Gauge

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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befarrer
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Year and Model: 1998 V70 AWD
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98 V70 GLT Fuel Gauge

Post by befarrer »

HI, just registered here. I bought a 98 V70 GLT AWD back in mid July, fixed a bunch of oil leaks, and did a bunch of maintenance to it. One thing I have noticed since I started driving it 2 months ago, the fuel gauge responds very slowly to fill ups. It takes at least an hour of driving before the fuel gauge stops rising to the correct level (Eg, I fill up when it reads 20L, drive highway for 1 hour, and it slowly rises to 70 over that hour). Once it stops rising, it will display the correct level until I fill up again. I have seen it reach the full level once, but usually by the time the gauge has caught up to the correct fuel level, I am already at least 1/8 of a tank down. This weekend, the temperature has dropped down to well below freezing, and my fuel gauge has not moved much at all since I filled up, I have driven 300km and it has hovered from 30-40L all the time, just above what I was at before I filled up. Is this a common issue, or is it something in the fuel sender? I'm thinking since it eventually reaches full, and reads correctly, the sender is correct, and that the gauge is the issue. From what I have read, removing fuel pump/sender on an AWD is not so simple.
scot850
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Re: 98 V70 GLT Fuel Gauge

Post by scot850 »

As the AWD has a 'saddle' type tank, it actually has 2 fuel level senders. One either side of the prop-shaft and the tank level is an average of the 2.

Not sure why it would take so long to show the correct reading after a fill up of the tank. The fact that it eventually gets there would point towards the fuel sensors are working.

You are correct that replacing or accessing them is a devil on an AWD. Many would just cut access holes under the rear seats to get to them. This is because dropping the rear sub-frame to get to them is the only other option.
Only thing I can think of is one of the sensors is sticking or there is a problem with the fuel level gauge.

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold
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befarrer
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Re: 98 V70 GLT Fuel Gauge

Post by befarrer »

Sorry for being a newb, is there somewhere where I can get a wiring diagram to the 98 V70 AWD wiring diagrams?
98 V70 GLT AWD
05 VW Golf TDI
93 Mazda B2200 with 13B rotary engine swap
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abscate
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Re: 98 V70 GLT Fuel Gauge

Post by abscate »

Look up in the General topics thread and there ar e directions to wiring diagrams
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