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Stacey007



Member Since: 25 Sep 2015
Location: Cheshire
Posts: 3849
United Kingdom 
Stuttering every now & again
Hello

My series 3 is normally great, starts after months of no use...

Recently when driving it stutters, almost like fuel starvation.

This weekend probably did 60 miles in it and the last 20 on a return trip it did it a few times.

I've had a recent service, new oils, plugs etc. I use the lead replacement adative. I do have an upgraded fuel filter to fit...

Anything else I should look at (oh and I did try and clean the carb not that long ago).


No real reason to it, ie not just when hot or under load, say uphill. Just does it when it suits....

Any ideas.


Thanks
Post #1068916 1st Jun 2025 9:59pm
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Screbble



Member Since: 26 Apr 2015
Location: Lancashire
Posts: 2272
United Kingdom 2004 Defender 90 Td5 XS CSW Zambezi Silver
Could it be dirt in the fuel?
Are the fuel tank and fuel lines quite old or have they been replaced?
Corrosion in the tank or degrading fuel lines can sometimes be the culprit.

Hopefully it will be something quick/easy and inexpensive 👍
Post #1068917 1st Jun 2025 10:08pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17852
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Petrol or diesel?

Lots of problems now due to ethanol in petrol. Sad
Post #1068935 2nd Jun 2025 11:43am
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Stacey007



Member Since: 25 Sep 2015
Location: Cheshire
Posts: 3849
United Kingdom 
Hello


Its a petrol 2 1/4


Thanks
Post #1068945 2nd Jun 2025 2:17pm
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Stacey007



Member Since: 25 Sep 2015
Location: Cheshire
Posts: 3849
United Kingdom 
Like you,


I do think its fuel related? I mean there is not an awful lot it can be... the fuel tank is relativly new... approx 4 years maybe 5

I have a new fuel filter and some hose and will see if I can change the pipe I can and hopefully this helps.

Interestingly it was better when full of fuel or this may ust be in my head...
Post #1068946 2nd Jun 2025 2:25pm
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BrickBox



Member Since: 05 Oct 2021
Location: Wales
Posts: 1003
Wales 2008 Defender 110 Puma 2.4 USW Zermatt Silver
Is it only doing it when the tank is low on fuel? Under 1/4 tank, for example? 2008 2.4 110 Utility Station Wagon XS.
Post #1068947 2nd Jun 2025 2:29pm
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ak615



Member Since: 22 Aug 2018
Location: essex
Posts: 190
Hole in the fuel pick up pipe ?
Post #1068967 2nd Jun 2025 5:52pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17852
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Check for crud in the float chamber.

If a classic LR has been unused for a time with ethanol petrol in the tank there is a high risk of corrosion and oxidisation in almost all of the fuel system, and it is not unknown for the brass mesh on the pick-up to.dissolve completely. Synthetic components such as 'rubber' pipes can swell internally and become blocked. There's also a tendency for a chalky white crud (currently unidentified) to accumulate in the carb.

It is disturbing how quickly those can happen too.

If you're laying up a petrol Series for a.while, e.g., over winter, I suggest running it completely out of fuel then putting a gallon of Aspen 4 in the tank, priming, and running on that for a few minutes. The Aspen has a very long life and is ethanol-free.
Post #1068970 2nd Jun 2025 6:11pm
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Dinnu



Member Since: 24 Dec 2019
Location: Lija
Posts: 3585
Malta 2012 Defender 90 Puma 2.2 CSW Santorini Black
Never owned (but wish) or worked on a petrol 2 1/4, so not specifically LR, but why is electrical dismissed? I would not overlook the high tension leads, points, distributer cap and coil. How old are they? Are the high tension leads fully pushed on to the spark plugs? 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
Post #1069017 3rd Jun 2025 4:24pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17852
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Electrical gremlins haven't been dismissed, they're next on the list after fuel gremlins!
Post #1069029 3rd Jun 2025 6:56pm
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Stacey007



Member Since: 25 Sep 2015
Location: Cheshire
Posts: 3849
United Kingdom 
Thanks

I will start with the fuel pipe / filter etc

Then look at electrical bits, the point / leads etc again were all new but 4 / 5 years ago
Post #1069033 3rd Jun 2025 8:42pm
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