Fuel Gauge working in reverse

Animesis · 26th September 2016, 12:38

So, quick brief, fuel gauge suddenly worked in reverse and the car ran dry a couple of weeks ago. Then the fuel gauge was stuck on empty for a week or so. Then appeared to start working again the other day, but after a few miles its clear its working in reverse as in the very first instance of problems.

To be clear, instead of the fuel gauge going down with the fuel being used, its going Up with the fuel being used.

Has anyone come across this and know what the issue is?

T-Cut · 26th September 2016, 20:15

I never heard of this particular problem before. But it does conjure up some comical thoughts.

I'd suggest checking the rheostat resistances to see if the floats are working. Maybe open up the tank ports and taking a look at them.

There's also a HowTo here: http://www.the75andztclub.co.uk/foru...d.php?t=194156

TC

HarryM1BYT · 26th September 2016, 20:37

Be aware that some of us have noticed that the gauge's displayed reading does seem to be an interpreted level - it can rise and fall based on your instantaneous fuel consumption. This doesn't seem to be your problem though.

Animesis · 27th September 2016, 09:35

As I feared, removal of the backseat! Its such am awkward thing -the left side has real trouble latching back on at the front when its lifted, was hoping I might get a "oh that old problem, do this", but alas its not to be
Shall be venturing under there this weekend

.. I do like the idea of a self-filling fuel tank ^^

T-Cut · 27th September 2016, 14:07

Quote:

Originally Posted by Animesis

As I feared, removal of the back seat! Its such an awkward thing - the left side has real trouble latching back on at the front when its lifted, was hoping I might get a "oh that old problem, do this", but alas its not to be

Oh that old problem. Maybe do this (see Post 2): http://www.the75andztclub.co.uk/foru...read.php?t=175

TC

T-Cut · 27th September 2016, 14:08

Quote:

Originally Posted by Animesis

As I feared, removal of the back seat! Its such an awkward thing - the left side has real trouble latching back on at the front when its lifted, was hoping I might get a "oh that old problem, do this", but alas its not to be

Oh that old problem. Maybe do this (see Post 2): http://www.the75andztclub.co.uk/foru...read.php?t=175

Maybe the spring clip wires need tweeking?

TC

Animesis · 27th September 2016, 14:46

When I got the car it wasnt on, and tried swapping the clips over, the awkward side still wouldnt clip on, it seems to be having trouble with the seat pushing far back enough. With an extra set of hands pushing the seat back with all their body weight I managed to get it clipped on. But after lifting it again this morning its back as it was refusing to go back enough to clip on!

T-Cut · 27th September 2016, 16:08

Quote:

Originally Posted by Animesis

- - - after lifting it again this morning its back as it was refusing to go back enough to clip on!

Make the notched pushrod as I described in the link.

TC

Animesis · 27th September 2016, 18:48

got that made up from steel, i can hook the rear bits under ok, for some reason the front clip doesnt line up for when pushing it down

cb750chris · 27th September 2016, 19:10

Of topic of the fuel gauge, but does your seat base have a lump at the back, under the seat back?
Just wondering if you have got seats from a tourer fitted, that would make them harder to fit the seat base.
Chris

26th September 2016, 12:38	#1
Animesis Loves to post Rover 75 saloon 2.0l Diesel Connoisseur Join Date: Apr 2016 Location: Wokingham Posts: 259 Thanks: 136 Thanked 21 Times in 15 Posts	Fuel Gauge working in reverse So, quick brief, fuel gauge suddenly worked in reverse and the car ran dry a couple of weeks ago. Then the fuel gauge was stuck on empty for a week or so. Then appeared to start working again the other day, but after a few miles its clear its working in reverse as in the very first instance of problems. To be clear, instead of the fuel gauge going down with the fuel being used, its going Up with the fuel being used. Has anyone come across this and know what the issue is? __________________ Gearbox change, clutch, subframe refurbish, handbrake mod, drumbrake repair, rear coils, plate PCB repair, sunroof drains refitted, trim leak fix, cruise control fix, cleared EGR/inlet, new strut bearings, USB sockets in rear ashtray, new front brake pipes/hoses, repaired undertray, new o/s rear upper arm, refurbished rear suspension&subframe, fixed back light leak, new exhaust, fitted HID xenons, FBH fix, new thermostat, armrest LEDs, wood dash, new hydromount, natnav, tyres, numberplates

26th September 2016, 20:37	#3
HarryM1BYT This is my second home 75 Contemporary SE Mk II 2004 Man. Sal. CDTi 135ps, FBH on red diesel, WinCE6 DD Join Date: May 2010 Location: Leeds Posts: 17,273 Thanks: 2,160 Thanked 2,061 Times in 1,586 Posts	Be aware that some of us have noticed that the gauge's displayed reading does seem to be an interpreted level - it can rise and fall based on your instantaneous fuel consumption. This doesn't seem to be your problem though. __________________ Harry How To's and items I offer for free, or just to cover the cost of my expenses... http://www.the75andztclub.co.uk/foru...40#post1764540 Fix a poor handbrake; DIY ABS diagnostic unit; Loan of the spanner needed to change the CDT belts; free OBD diagnostics +MAF; Correct Bosch MAF cheap; DVB-T install in an ex-hi-line system; DD install with a HK amp; FBH servicing. I've taken a vow of poverty. To annoy me, send money.

27th September 2016, 09:35	#4
Animesis Loves to post Rover 75 saloon 2.0l Diesel Connoisseur Join Date: Apr 2016 Location: Wokingham Posts: 259 Thanks: 136 Thanked 21 Times in 15 Posts	As I feared, removal of the backseat! Its such am awkward thing -the left side has real trouble latching back on at the front when its lifted, was hoping I might get a "oh that old problem, do this", but alas its not to be Shall be venturing under there this weekend .. I do like the idea of a self-filling fuel tank ^^ __________________ Gearbox change, clutch, subframe refurbish, handbrake mod, drumbrake repair, rear coils, plate PCB repair, sunroof drains refitted, trim leak fix, cruise control fix, cleared EGR/inlet, new strut bearings, USB sockets in rear ashtray, new front brake pipes/hoses, repaired undertray, new o/s rear upper arm, refurbished rear suspension&subframe, fixed back light leak, new exhaust, fitted HID xenons, FBH fix, new thermostat, armrest LEDs, wood dash, new hydromount, natnav, tyres, numberplates Last edited by Animesis; 27th September 2016 at 13:17..

27th September 2016, 14:46	#7
Animesis Loves to post Rover 75 saloon 2.0l Diesel Connoisseur Join Date: Apr 2016 Location: Wokingham Posts: 259 Thanks: 136 Thanked 21 Times in 15 Posts	When I got the car it wasnt on, and tried swapping the clips over, the awkward side still wouldnt clip on, it seems to be having trouble with the seat pushing far back enough. With an extra set of hands pushing the seat back with all their body weight I managed to get it clipped on. But after lifting it again this morning its back as it was refusing to go back enough to clip on! __________________ Gearbox change, clutch, subframe refurbish, handbrake mod, drumbrake repair, rear coils, plate PCB repair, sunroof drains refitted, trim leak fix, cruise control fix, cleared EGR/inlet, new strut bearings, USB sockets in rear ashtray, new front brake pipes/hoses, repaired undertray, new o/s rear upper arm, refurbished rear suspension&subframe, fixed back light leak, new exhaust, fitted HID xenons, FBH fix, new thermostat, armrest LEDs, wood dash, new hydromount, natnav, tyres, numberplates

27th September 2016, 18:48	#9
Animesis Loves to post Rover 75 saloon 2.0l Diesel Connoisseur Join Date: Apr 2016 Location: Wokingham Posts: 259 Thanks: 136 Thanked 21 Times in 15 Posts	got that made up from steel, i can hook the rear bits under ok, for some reason the front clip doesnt line up for when pushing it down __________________ Gearbox change, clutch, subframe refurbish, handbrake mod, drumbrake repair, rear coils, plate PCB repair, sunroof drains refitted, trim leak fix, cruise control fix, cleared EGR/inlet, new strut bearings, USB sockets in rear ashtray, new front brake pipes/hoses, repaired undertray, new o/s rear upper arm, refurbished rear suspension&subframe, fixed back light leak, new exhaust, fitted HID xenons, FBH fix, new thermostat, armrest LEDs, wood dash, new hydromount, natnav, tyres, numberplates

26th September 2016, 20:15	#2
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	I never heard of this particular problem before. But it does conjure up some comical thoughts. I'd suggest checking the rheostat resistances to see if the floats are working. Maybe open up the tank ports and taking a look at them. There's also a HowTo here: http://www.the75andztclub.co.uk/foru...d.php?t=194156 TC

27th September 2016, 19:10	#10
cb750chris Trader Rover 75 Tourer Join Date: Apr 2011 Location: Portsmouth Posts: 849 Thanks: 201 Thanked 292 Times in 200 Posts	Of topic of the fuel gauge, but does your seat base have a lump at the back, under the seat back? Just wondering if you have got seats from a tourer fitted, that would make them harder to fit the seat base. Chris __________________ Now offering T4 services in the Fareham area Replacement keys programmed / supplied / cut Diesel 135 upgrade available IPK virginisation and T4 matching available Sorry, due to a big change in home circumstances, I am unable to do any large jobs at present, but can still offer evening time diagnostics.