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Profyaffle



Member Since: 03 Oct 2016
Location: N Yorks
Posts: 526

United Kingdom 
Fuel Cut off solenoid
Hello
I am fitting a switched fuel cut off solenoid. Does the feed need to be an ignition live or would a permanent live to the switch be ok?

Thanks

Julia
Post #604423 24th Feb 2017 8:55am
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240

United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
I'm not sure that it matters. The pump won't operate unless your manual switch is activated either way. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #604427 24th Feb 2017 9:05am
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Browjam



Member Since: 03 Jun 2014
Location: South East
Posts: 114

United Kingdom 2013 Defender 90 Puma 2.2 XS CSW Havana
Fuel Cut off
Good modification, had this done recently - biggest problem is trying to find somewhere to hide the switch
Post #604428 24th Feb 2017 9:09am
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Profyaffle



Member Since: 03 Oct 2016
Location: N Yorks
Posts: 526

United Kingdom 
Thank you... I think it will be less faffing with a permanent live.
Post #604432 24th Feb 2017 9:30am
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shaggydog



Member Since: 12 Aug 2012
Location: Kent
Posts: 3346

United Kingdom 1991 Defender 110 200 Tdi USW Arles Blue
Remember to put a non return valve in the return pipe (facing the correct way of course) otherwise pump can pull fuel from the tank around the switch via the return. Running Restoration Thread http://www.defender2.net/forum/post323197.html#323197

Self confessed mileage hunter Very Happy
Post #604492 24th Feb 2017 12:58pm
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5725

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
Why bother with a visible switch, why not say using something like a headphone jack socket, that you insert a plug into which completes the circuit? Keep this on a lanyard on the keys so you can't forget to remove it? (like a reverse kill switch on an outboard engine, or dead mans handle.) 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #604498 24th Feb 2017 1:08pm
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Profyaffle



Member Since: 03 Oct 2016
Location: N Yorks
Posts: 526

United Kingdom 
shaggydog wrote:
Remember to put a non return valve in the return pipe (facing the correct way of course) otherwise pump can pull fuel from the tank around the switch via the return.


Thanks for the advice... but... I'm a novice and I don't know where the return is or where/which NRV to get.. Will it be obvious when I look at the tank? It's a 200tdi 90 btw.

Julia.
Post #604513 24th Feb 2017 2:04pm
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Profyaffle



Member Since: 03 Oct 2016
Location: N Yorks
Posts: 526

United Kingdom 
excossack wrote:
Why bother with a visible switch, why not say using something like a headphone jack socket, that you insert a plug into which completes the circuit? Keep this on a lanyard on the keys so you can't forget to remove it? (like a reverse kill switch on an outboard engine, or dead mans handle.)


Good idea but I'm stretching my abilities and knowledge doing a simple switch.. Wink
Post #604514 24th Feb 2017 2:05pm
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Low-Range



Member Since: 30 Sep 2016
Location: BC
Posts: 41

Canada 
Not that I know much, but power on opens the valve, I cant imagine that that wouldn't wear out the switch sooner. I cant see the advantage. It could be a counter measure to theft if not an obvious power switch marked fuel solenoid., but other than that why would you want to?
Post #605391 27th Feb 2017 9:50pm
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Profyaffle



Member Since: 03 Oct 2016
Location: N Yorks
Posts: 526

United Kingdom 
It is supposed to be anti theft device so thats why I'm fitting one, with either a hidden or a disguised switch.
Post #605475 28th Feb 2017 9:18am
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macfrank



Member Since: 05 Nov 2015
Location: somewhere in the north
Posts: 983

Germany 2015 Defender 110 Puma 2.2 SW Keswick Green
Hi, I thought about this too. Have an alarm with a relay for that purpose, but what happens if you just cut off the fuel by switching off the pump? Will the engine run dry (Diesel, not good) or will the ECU say "oops" and cut the engine?
Post #605496 28th Feb 2017 11:39am
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Profyaffle



Member Since: 03 Oct 2016
Location: N Yorks
Posts: 526

United Kingdom 
Sorry I don't know.. I don't have any electronics being a 200Tdi... Would it not just be like running out of fuel? Neutral
Post #605500 28th Feb 2017 11:52am
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shaggydog



Member Since: 12 Aug 2012
Location: Kent
Posts: 3346

United Kingdom 1991 Defender 110 200 Tdi USW Arles Blue
It will run out of fuel and stop doing no real damage.

In order to restart it you will just have to purge the air and re-prime the system using the lift pump on the side of the engine.

Proper kit Thumbs Up Running Restoration Thread http://www.defender2.net/forum/post323197.html#323197

Self confessed mileage hunter Very Happy
Post #605512 28th Feb 2017 12:54pm
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240

United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
That's right for a 200tdi but may not be for a Puma engine. It's really not recommended to run modern diesels dry of fuel and there is even a built in 'strategy' that's intended to give plenty of warning and prevent it happening. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #605516 28th Feb 2017 1:10pm
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shaggydog



Member Since: 12 Aug 2012
Location: Kent
Posts: 3346

United Kingdom 1991 Defender 110 200 Tdi USW Arles Blue
Oh no I was specifically talking about vehicles upto 300Tdi

Common rail engines get very upset if you let them run dry, Puma's especially can be a nightmare to get running again as you need special bleeding pumps (I believe for 2.4?)

That said, It will most likely stall somewhere close and in the middle of a road drawing attention to itself and need to be abandoned rather than get away so its one of those calculated risks as ever. Running Restoration Thread http://www.defender2.net/forum/post323197.html#323197

Self confessed mileage hunter Very Happy
Post #605521 28th Feb 2017 1:20pm
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