fuel gauge wrong

yorkie72 · 10th October 2009, 22:11

the last owner told me that when my diesel gauge gets to a quarter of a tank,its nearly empty,is there a way that i can find out if the float in the tank is faulty or its on the clocks

if its the float,are they easy to change

MN190 · 10th October 2009, 22:23

It sounds like the in tank pump is faulty.

yorkie72 · 10th October 2009, 22:28

are they easy to change????????

T-Cut · 11th October 2009, 16:14

The fuel gauge takes outputs from two float/sender units in the tank. Either one may stick, giving a false average result. The pump on the RHS has a float as does the in-tank filter module on the LHS. You can probably determine which is faulty using the IPK diagnostics. The individual float readings will be shown on the screen. You can then open up the correct one. I guess it's possible that the pump has been replaced at some time. Diesel pumps are a regular issue. If so, the attached float may not have been positioned correctly in the tank. Here's a photo of a pump with the float.

Accessing either unit is pretty easy and there are HowTos which will help. You may find these useful.

http://www.the75andztclub.co.uk/foru...ead.php?t=9068

This was done on a petrol tank, but the principle is the same: http://www.the75andztclub.co.uk/foru...ead.php?t=9108

TC

10th October 2009, 22:11	#1
yorkie72 Avid contributor 75 classic cdt tourer Join Date: Oct 2009 Location: barry,south wales Posts: 105 Thanks: 0 Thanked 0 Times in 0 Posts	fuel gauge wrong the last owner told me that when my diesel gauge gets to a quarter of a tank,its nearly empty,is there a way that i can find out if the float in the tank is faulty or its on the clocks if its the float,are they easy to change

10th October 2009, 22:23	#2
MN190 Posted a thing or two MG ZT 190+ Join Date: Nov 2006 Location: North Norfolk Posts: 1,423 Thanks: 2 Thanked 11 Times in 11 Posts	It sounds like the in tank pump is faulty.

10th October 2009, 22:28	#3
yorkie72 Avid contributor 75 classic cdt tourer Join Date: Oct 2009 Location: barry,south wales Posts: 105 Thanks: 0 Thanked 0 Times in 0 Posts	are they easy to change????????

11th October 2009, 16:14	#4
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,754 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	The fuel gauge takes outputs from two float/sender units in the tank. Either one may stick, giving a false average result. The pump on the RHS has a float as does the in-tank filter module on the LHS. You can probably determine which is faulty using the IPK diagnostics. The individual float readings will be shown on the screen. You can then open up the correct one. I guess it's possible that the pump has been replaced at some time. Diesel pumps are a regular issue. If so, the attached float may not have been positioned correctly in the tank. Here's a photo of a pump with the float. Accessing either unit is pretty easy and there are HowTos which will help. You may find these useful. http://www.the75andztclub.co.uk/foru...ead.php?t=9068 This was done on a petrol tank, but the principle is the same: http://www.the75andztclub.co.uk/foru...ead.php?t=9108 TC