Fluctuating fuel gauge

Gentil79 · 22nd December 2016, 21:41

Hi all,

The fuel gauge is behaving a bit weird. Basically, when the fuel reaches the mark before the "half full" it moves according to the way I drive: moves toward empty when I turn left and moves towards full when I brake or I'm slowing down... any ideas? Only had the car for a few days.

FLYING BANANA · 23rd December 2016, 08:47

It will be the sender unit in the tank. I've had this problem with Banana now for a couple of years.

T-Cut · 23rd December 2016, 09:41

The dual float system can be temperamental if either tank module has been replaced incorrectly or the float arms not positioned exactly right. There are loads of discussions and fixes described. Check this out: https://cse.google.co.uk/cse?hl=en&c...20fuel%20gauge

TC

Gentil79 · 21st January 2017, 19:17

Found the problem; after refitting the abs sensor, the fuel gauge went back to normal.

FrenchMike · 22nd January 2017, 09:44

Quote:

Originally Posted by Gentil79

Found the problem; after refitting the abs sensor, the fuel gauge went back to normal.

May be they share a common earth ? was the sensor in short circuit ?

Gentil79 · 22nd January 2017, 22:43

Quote:

Originally Posted by FrenchMike

May be they share a common earth ? was the sensor in short circuit ?

No. The sensor simply wasn't there, because it had to be drilled out to fit the new wheel bearing. No sensor for a few weeks (and consequently abs light on and no speedo) until yesterday when I put a new sensor in when I fitted new discs and pads

chris75 · 23rd January 2017, 09:47

Probably the fuel gauge takes a feed off the ABS sensor to calculate fuel used based on number of wheel turns .........

Wouldn't surprise me !

22nd December 2016, 21:41	#1
Gentil79 Avid contributor MG ZT Join Date: Nov 2016 Location: Cobham Posts: 108 Thanks: 22 Thanked 12 Times in 11 Posts	Fluctuating fuel gauge Hi all, The fuel gauge is behaving a bit weird. Basically, when the fuel reaches the mark before the "half full" it moves according to the way I drive: moves toward empty when I turn left and moves towards full when I brake or I'm slowing down... any ideas? Only had the car for a few days. __________________ Gentil Gomes da Costa

23rd December 2016, 08:47	#2
FLYING BANANA Moderator/Club Shop MG ZT 1.8t+. No.3 of 4 in Sunspot Yellow & Ford Fiesta in Black. Join Date: Aug 2010 Location: Rattler Farm Posts: 22,554 Thanks: 9,270 Thanked 15,645 Times in 6,806 Posts	It will be the sender unit in the tank. I've had this problem with Banana now for a couple of years. __________________ 233,250. onen hag oll

21st January 2017, 19:17	#4
Gentil79 Avid contributor MG ZT Join Date: Nov 2016 Location: Cobham Posts: 108 Thanks: 22 Thanked 12 Times in 11 Posts	Found the problem; after refitting the abs sensor, the fuel gauge went back to normal. __________________ Gentil Gomes da Costa

23rd January 2017, 09:47	#7
chris75 same car since 2005 2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006 Location: Ellesmere Port , Cheshire Posts: 3,811 Thanks: 379 Thanked 549 Times in 466 Posts	Probably the fuel gauge takes a feed off the ABS sensor to calculate fuel used based on number of wheel turns ......... Wouldn't surprise me ! __________________ Who said it was simples ?

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23rd December 2016, 09:41	#3
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,751 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	The dual float system can be temperamental if either tank module has been replaced incorrectly or the float arms not positioned exactly right. There are loads of discussions and fixes described. Check this out: https://cse.google.co.uk/cse?hl=en&c...20fuel%20gauge TC