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yaho



Member Since: 26 Nov 2008
Location: Bialystok
Posts: 200
Poland 2007 Defender 90 Puma 2.4 SW Keswick Green
Fuel gauge failure
After some unusual readings (indicated fuel level too low) the gauge sits down at zero now, reporting low fuel alarm each time I start the engine.

I wonder what will happen if I continue to drive - will fuel management system stop the engine after certain number of kilometres to prevent total out of fuel? Janusz
www.yahodeville.com
Post #582270 2nd Dec 2016 9:05pm
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Strang3rr



Member Since: 26 May 2016
Location: St.Petersburg
Posts: 8
Russia 2008 Defender 90 Puma 2.4 HT Santorini Black
As i know it depends on model year... 2.2 and may be late 2.4 will cut off the engine... early 2.4 will not... IMHO
Post #582373 3rd Dec 2016 12:31pm
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log11



Member Since: 31 Mar 2009
Location: ATHENS
Posts: 28
Greece 
i have the same problem.

Any solution?
Post #582844 5th Dec 2016 1:15pm
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Cupboard



Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971
United Kingdom 2011 Defender 110 Puma 2.4 HT Corris Grey
Eventually the ECU will start to make the engine misfire, then it will cut out and only allow you to drive a mile at a time to protect itself.

http://www.defender2.net/forum/topic35577.html
http://www.defender2.net/forum/topic30145.html

Quote:
LOW FUEL INDICATION AND RUN DRY STRATEGY
The run-dry strategy is used to maintain the systems fuel prime at fuel run out. It ensures the minimum amount of fuel is always left in the swirl pot.

The instrument cluster activates the yellow low fuel warning light (next to the fuel gauge) with 17% of fuel remaining in the tank. The fuel gauge will indicate empty with 12% of fuel left in the tank. With 6 liters left in the tank the run-dry strategy will be invoked.

An engine mis-fire will be induced for approximately 1 mile after which the engine will be shut down. The engine can be re-started in mis-fire mode and will continue to run for a further mile until the engine shuts down again. This can be repeated until the fuel suction port in the tank is uncovered and causes engine fuel starvation and loss of prime.

Re-starts after run-dry shut down are not recommended.


The solution is to fix the sender Laughing
Post #582850 5th Dec 2016 1:48pm
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yaho



Member Since: 26 Nov 2008
Location: Bialystok
Posts: 200
Poland 2007 Defender 90 Puma 2.4 SW Keswick Green
I have an early Puma I guess. 115 km on 'empty' and still going on without misfire.
Build date: Feb 2007. Janusz
www.yahodeville.com
Post #582885 5th Dec 2016 5:54pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
1. check wiring only two wires with multimeter may open cct

2. fuel sender may be open cct


Click image to enlarge
Post #582889 5th Dec 2016 6:08pm
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yaho



Member Since: 26 Nov 2008
Location: Bialystok
Posts: 200
Poland 2007 Defender 90 Puma 2.4 SW Keswick Green
Thank you! I was just looking at the same diagrams.
As far as I understand, the fuel level sensor is resistor type. Do you know the min-max values of the resistor? If known, I can plug proper resistor into the connector at the tank and see what the gauge shows.
Or there are easier ways to check it? Janusz
www.yahodeville.com
Post #582892 5th Dec 2016 6:31pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
Disconnecter at the tank and at the instrument panel short out two pins con check at instrument end if you can or disconnecter instrument panel end and con check from end ether way it going to to be Censored
Post #582899 5th Dec 2016 7:10pm
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yaho



Member Since: 26 Nov 2008
Location: Bialystok
Posts: 200
Poland 2007 Defender 90 Puma 2.4 SW Keswick Green
Bow down Thumbs Up Janusz
www.yahodeville.com
Post #582911 5th Dec 2016 7:55pm
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yaho



Member Since: 26 Nov 2008
Location: Bialystok
Posts: 200
Poland 2007 Defender 90 Puma 2.4 SW Keswick Green
As the follow up to the story. I have removed suspected gauge and investigated the sensor. It is encoder, not resistance type, so will not show any resistance (open / infinity). See the pictures.


Click image to enlarge


Click image to enlarge Janusz
www.yahodeville.com
Post #643779 14th Aug 2017 5:54am
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