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kljw



Member Since: 23 Jan 2009
Location: Edinburgh
Posts: 265

Scotland 2009 Defender 90 Puma 2.4 SVX Soft Top Auto Santorini Black
Low Ratio Senor
Hi ALl
posted a thred about idle jack, and this is related to it. the question i have is this:

if i where to disconnect the low ration sensor wire, which sends a signal to the ECU to operate the engine slightly different, i.e. throtle responce and IDLE JACK, and then went onto use low ratio, what effect would this have on the running of things? i understand that the idel jack would not longer kick in, and that i would have a throtle action of road use, but would there be any other effects, say on traction conrol?

the dealership have spoken to land rover, who have said not recomended, but did not offer an explanation why. i am not sure if i poised the question correctly, or they understood fully what i was hoping to achieve. the reason why i need to loose IDLE JACK id that when i low ratio, it kicks in, and because i have an auto box fitted, the landy runs off.

thougths and comments are welcome. i have a wireing diagrame, so i can see which wire needs to be disconected, but would like more info on this before i go ahead and try it. Cheers
keith
puer claudius
Post #10520 6th May 2009 7:39am
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AndrewS



Member Since: 10 Apr 2007
Location: Hereford
Posts: 3707

United Kingdom 2013 Defender 130 Puma 2.2 SW Rimini Red
Why not try it but in a safe place of cause.
Post #10525 6th May 2009 9:00am
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kljw



Member Since: 23 Jan 2009
Location: Edinburgh
Posts: 265

Scotland 2009 Defender 90 Puma 2.4 SVX Soft Top Auto Santorini Black
Hi Andrew
thought about that, but need to know what effect it will have on the running, eg, will it go bang, or will i cause damage in another way? the logic is fairly sound, but i could be missing something. Cheers
keith
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Post #10526 6th May 2009 9:09am
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AndrewS



Member Since: 10 Apr 2007
Location: Hereford
Posts: 3707

United Kingdom 2013 Defender 130 Puma 2.2 SW Rimini Red
Its only there to lift the revs to reduce the sever engine braking that the Puma has, and its only really required when going down very steep slopes.
Post #10531 6th May 2009 11:46am
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8030

 2011 Defender 110 Puma 2.4 USW Stornoway Grey
i cant see how disconnecting the sender will make it 'not run' i would try it. the td5 had a similar setup and you either disconnected it or joined the two wires to turn it off.

I expect it would just not remap the low range pedal travel and you would not get idle jack, although i did think the idle jack had a sensor on 1st gear rather than just low. ie you had to have 1st and low for it to work.

disconnecting low should do it though. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #10571 8th May 2009 8:06am
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kljw



Member Since: 23 Jan 2009
Location: Edinburgh
Posts: 265

Scotland 2009 Defender 90 Puma 2.4 SVX Soft Top Auto Santorini Black
James
that was my therory to, the good thing though, is i have had an auto box fitted, so no first gear sensor connected. and the idle jack kits in in second, so i i think i will locate the high low swhich and disconect.

what this space, or the 10'clock news for results! Cheers
keith
puer claudius
Post #10574 8th May 2009 9:38am
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kljw



Member Since: 23 Jan 2009
Location: Edinburgh
Posts: 265

Scotland 2009 Defender 90 Puma 2.4 SVX Soft Top Auto Santorini Black
Update
Hi
just a quick update, found the low ratio switch connector last night, and disconected it. all works fine, no issues at all.
next step is to add a switch in line, so i can turn select the funtion at will, Cheers
keith
puer claudius
Post #11167 21st May 2009 1:03pm
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Grockle



Member Since: 24 Nov 2008
Location: Peak District National Park
Posts: 2266

United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Tonga Green
Well done Keith job done,bong, bong etc Laughing 2.4 90 XS
1968 1/32 scale Britains 109 Pick up.
Post #11222 23rd May 2009 6:42am
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8030

 2011 Defender 110 Puma 2.4 USW Stornoway Grey
Re: Update
kljw wrote:
Hi
just a quick update, found the low ratio switch connector last night, and disconected it. all works fine, no issues at all.
next step is to add a switch in line, so i can turn select the funtion at will,


when you say all works fine do you mean with it disconnected you dont get idle jack and the low range fueling?

Does the anti stall still work the same - i would presume yes. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #12746 7th Jul 2009 7:46pm
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kljw



Member Since: 23 Jan 2009
Location: Edinburgh
Posts: 265

Scotland 2009 Defender 90 Puma 2.4 SVX Soft Top Auto Santorini Black
JST
the only differenc i have noticed is that i do not get the idle jack, which is a pain when you have an auto box fitted as i do.
as for the fueling, i did not know that was altered in anyway. perhaps you could explain what changes. Cheers
keith
puer claudius
Post #12754 8th Jul 2009 11:01am
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mse



Member Since: 06 Apr 2008
Location: UK
Posts: 5035

United Kingdom 2016 Defender 110 Puma 2.2 XS CSW Scotia Grey
kljw wrote:
JST
the only differenc i have noticed is that i do not get the idle jack, which is a pain when you have an auto box fitted as i do.
as for the fueling, i did not know that was altered in anyway. perhaps you could explain what changes.


It does remap for low ratio Mike
Post #12792 8th Jul 2009 10:18pm
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kljw



Member Since: 23 Jan 2009
Location: Edinburgh
Posts: 265

Scotland 2009 Defender 90 Puma 2.4 SVX Soft Top Auto Santorini Black
MSE
i was aware that you get a different throtle responce, so that you have more control, but was not aware that the fueling was altered. can you explain in what way? as interested in why the fueling should need to be changed, as this will effect the running will it not? Cheers
keith
puer claudius
Post #12795 9th Jul 2009 7:13am
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