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HansT



Member Since: 25 Dec 2012
Location: Mariefred
Posts: 173
Sweden 2004 Defender 110 Td5 SW Belize Green
Faulty fuel gauge readings
After replacing the fuel pump, the fuel gauge readings are incorrect. When the gauge shows 1/2 tank, I can fill 55 litres. I take it that I managed to bend the rod to the float when fitting the pump. Rolling Eyes

Are there any measurements that I can check when I take out the pump again to fix the problem? Like distance between bottom of float to bottom of pump?
Post #650386 14th Sep 2017 9:52pm
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gazman



Member Since: 17 Aug 2015
Location: Liverpool
Posts: 652
United Kingdom 2003 Defender 90 Td5 HT Alpine White
I bet you fitted a disco fuel pump. They read differently due to the different shape of the tanks 2014 - current ..... 2003 defender td5 90 (my car)
2009 - current .... 2005 zx10r
Post #650449 15th Sep 2017 11:31am
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JJ



Member Since: 18 May 2009
Location: Winchester
Posts: 932
United Kingdom 1987 Defender 110 V8 Petrol CSW Corris Grey
Same thing happened to me . Fitted by a professional Smile

I rarely run low on fuel so it was a long time after the pump replacement that I realised the problem.

Quite common apparently to bend the rod. HR064 Hampshire and Berkshire 4x4 Response
Post #650471 15th Sep 2017 3:27pm
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HansT



Member Since: 25 Dec 2012
Location: Mariefred
Posts: 173
Sweden 2004 Defender 110 Td5 SW Belize Green
Re: Faulty fuel gauge readings
Yes gazman, I think you are right. I bought the pump long time ago and there was some confusion about the part No at that time and I also paid much less then what I expected.

Now when you mentioned it I also recall that the difference between the two is the complete fuel gauge sender unit on the pump. I saved the old pump so today I removed the sender unit from this and I will fit it to the new pump.

Do you think this will work?
Post #650481 15th Sep 2017 4:13pm
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diesel_jim



Member Since: 13 Oct 2008
Location: hiding
Posts: 6095
United Kingdom 2006 Defender 110 Td5 SW Epsom Green
Yes it will.... disco and defender "pumps" themselves are identical.

Just the float arm needs swapping over.

And strangely enough; if you buy one new the disco one seems to be a tad cheaper.
Post #650492 15th Sep 2017 5:37pm
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grafty99



Member Since: 15 Aug 2012
Location: North Devon
Posts: 4786
United Kingdom 2002 Defender 90 Td5 HT Caledonian Blue
Yeah disco one is cheaper, I had the same when I helped our neighbour with his Td5 fuel pump. Disco one about £40 cheaper I seem to recall Thumbs Up 2002 90 Td5 Station Wagon
1990 Vogue SE
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Post #650494 15th Sep 2017 5:43pm
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