Dodgy fuel gauge

Alex D · 3rd December 2020, 19:51

Evening all. Either I'm going insane or there's something up with my fuel gauge. When I got home last night I'm fairly sure the gauge was reading somewhere between half and 1/4 of a tank. When I started it up this morning it was bang on 3/4 of a tank. Any ideas?

Westonboy · 3rd December 2020, 20:05

I know this will sound insane but when my fuel guage behaved like that it was a faulty offside front abs sensor, is your speedo affected?

gnu · 3rd December 2020, 20:21

Mines played up when I’ve brimmed it and 1 of the 2 level floats has got stuck up the top. That wouldn’t explain an overnight change though

Alex D · 3rd December 2020, 20:27

To be honest I only live a 10 minute walk from work so I haven't taken much notice of the speedo. (I know it's lazy but I can't be NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD- walking, especially in this weather!) I've got college tomorrow so I'll keep an eye on the speedo and fuel gauge and see what they do.

It runs · 4th December 2020, 03:15

Again OSF abs sensor . I had the same . Had to change the whole hub in the end no Idea why new sensor cured for a week . So changed the lot then cured . If it is this bear with it for a bit and in due course your abs ligh should illuminate as well

Gunnerhavesome · 4th December 2020, 05:26

I have had some issues with mine although very infrequently. it usually happens when I fuel up, I always top right up and sometimes start up only for the gauge to show half or 3/4 tank. It usually sorts itself out after either sitting over night or after the next few start ups. However as always fill it and reset the odo i know roughly how afar I can go on a tank full.

This habit stems from my other vehicle an old Range Rover with a 4.6 V8 lump in it. The fuel gauge on that packed up years ago and as I only use it for 3 months over the winter and don't want to spend the £800-1000 to drop the tank to replace the sender unit. So I always fill right up and on a 100 litre tank is a fair amount but given where I use the car it only costs about £45 but then reset the Odo and know I have 200 miles yes that's it only 200 but I know I need to top off again at about 180 miles and then it usually takes about 80 litres so the system works and I haven't run out yet.

Sorry this doesn't fix your issue but if you top it off and know how far you can go on a tank full no worries.

Alex D · 4th December 2020, 09:56

It was reading half way between 3/4 and 1/2 when I started it up this morning and just under 1/2 when I got to college. No issues with speedo. It may be unrelated but I’ve noticed that the gauge has gone down quicker since I filled it up a few weeks ago than it did last time I filled up. So maybe it was reading low and has now sorted itself out?

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It runs · 4th December 2020, 17:05

Maybe a gremlin hiding behind the dash

COLVERT · 4th December 2020, 19:19

Quote:

Originally Posted by Alex D

It was reading half way between 3/4 and 1/2 when I started it up this morning and just under 1/2 when I got to college. No issues with speedo. It may be unrelated but I’ve noticed that the gauge has gone down quicker since I filled it up a few weeks ago than it did last time I filled up. So maybe it was reading low and has now sorted itself out?

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Is work and college the same place because if not, from your gauge reading' you live a long way from work. 2 gallons or so.---

Alex D · 4th December 2020, 19:23

Work is about 800 yards away and college is half an hour away (17 miles)

3rd December 2020, 19:51	#1
Alex D Regular poster 1999 Rover 75 2.0 V6 Connoisseur SE, 1998 Rover 825 Sterling Join Date: Sep 2020 Location: Derbyshire Posts: 96 Thanks: 67 Thanked 76 Times in 24 Posts	Dodgy fuel gauge Evening all. Either I'm going insane or there's something up with my fuel gauge. When I got home last night I'm fairly sure the gauge was reading somewhere between half and 1/4 of a tank. When I started it up this morning it was bang on 3/4 of a tank. Any ideas?

3rd December 2020, 20:21	#3
gnu Gets stuck in MG ZT Join Date: Apr 2018 Location: Bristol Posts: 695 Thanks: 332 Thanked 164 Times in 133 Posts	Mines played up when I’ve brimmed it and 1 of the 2 level floats has got stuck up the top. That wouldn’t explain an overnight change though __________________ gnu

4th December 2020, 03:15	#5
It runs Avid contributor Rover 75 saloon Join Date: Aug 2020 Location: Skelmersdale Posts: 181 Thanks: 15 Thanked 49 Times in 42 Posts	Again OSF abs sensor . I had the same . Had to change the whole hub in the end no Idea why new sensor cured for a week . So changed the lot then cured . If it is this bear with it for a bit and in due course your abs ligh should illuminate as well __________________ Changed everything that needs changing and everything that didn't . It's called preventive maintenance.

4th December 2020, 17:05	#8
It runs Avid contributor Rover 75 saloon Join Date: Aug 2020 Location: Skelmersdale Posts: 181 Thanks: 15 Thanked 49 Times in 42 Posts	Maybe a gremlin hiding behind the dash __________________ Changed everything that needs changing and everything that didn't . It's called preventive maintenance.

3rd December 2020, 20:05	#2
Westonboy Posted a thing or two Honda Jazz Join Date: Jan 2012 Location: Llangollen Posts: 1,025 Thanks: 301 Thanked 344 Times in 158 Posts	I know this will sound insane but when my fuel guage behaved like that it was a faulty offside front abs sensor, is your speedo affected?

3rd December 2020, 20:27	#4
Alex D Regular poster 1999 Rover 75 2.0 V6 Connoisseur SE, 1998 Rover 825 Sterling Join Date: Sep 2020 Location: Derbyshire Posts: 96 Thanks: 67 Thanked 76 Times in 24 Posts	To be honest I only live a 10 minute walk from work so I haven't taken much notice of the speedo. (I know it's lazy but I can't be NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD- walking, especially in this weather!) I've got college tomorrow so I'll keep an eye on the speedo and fuel gauge and see what they do.

4th December 2020, 05:26	#6
Gunnerhavesome Avid contributor 2001 Rover 75 2.0 V6 Con SE, Range Rover P38 4.6 for my Russian winter home Join Date: Jan 2018 Location: France Feb to October/Sevastopol Crimea November to Jan Posts: 145 Thanks: 155 Thanked 43 Times in 35 Posts	I have had some issues with mine although very infrequently. it usually happens when I fuel up, I always top right up and sometimes start up only for the gauge to show half or 3/4 tank. It usually sorts itself out after either sitting over night or after the next few start ups. However as always fill it and reset the odo i know roughly how afar I can go on a tank full. This habit stems from my other vehicle an old Range Rover with a 4.6 V8 lump in it. The fuel gauge on that packed up years ago and as I only use it for 3 months over the winter and don't want to spend the £800-1000 to drop the tank to replace the sender unit. So I always fill right up and on a 100 litre tank is a fair amount but given where I use the car it only costs about £45 but then reset the Odo and know I have 200 miles yes that's it only 200 but I know I need to top off again at about 180 miles and then it usually takes about 80 litres so the system works and I haven't run out yet. Sorry this doesn't fix your issue but if you top it off and know how far you can go on a tank full no worries.

4th December 2020, 09:56	#7
Alex D Regular poster 1999 Rover 75 2.0 V6 Connoisseur SE, 1998 Rover 825 Sterling Join Date: Sep 2020 Location: Derbyshire Posts: 96 Thanks: 67 Thanked 76 Times in 24 Posts	It was reading half way between 3/4 and 1/2 when I started it up this morning and just under 1/2 when I got to college. No issues with speedo. It may be unrelated but I’ve noticed that the gauge has gone down quicker since I filled it up a few weeks ago than it did last time I filled up. So maybe it was reading low and has now sorted itself out? Sent from my iPhone using Tapatalk

4th December 2020, 19:23	#10
Alex D Regular poster 1999 Rover 75 2.0 V6 Connoisseur SE, 1998 Rover 825 Sterling Join Date: Sep 2020 Location: Derbyshire Posts: 96 Thanks: 67 Thanked 76 Times in 24 Posts	Work is about 800 yards away and college is half an hour away (17 miles)