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LR3 won't start
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Yes 5K is 5000 ohms
  
Post #193151129th Mar 2018 7:10 pm
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Skagg
 


Member Since: 15 May 2015
Location: Not where i'd like to be
Posts: 1023

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Yulong WhiteDiscovery 4

I've been reading this thread with interest.

As previously posted in another thread I'd presumed all my glow plugs were kaput which was causing poor starting in conditions but 7/8 degC.

Having read your post it raised my optimism that perhaps it wasn't the glow plugs but maybe a faulty temperature sensor that was causing the poor starting by preventing the plugs from initialising.

I was about to push the buy now button on that auction site for a new sensor & thought, hang on, I've already checked the plugs & get a voltage to them, i just can't measure any resistance.

In my simple mind this would indicate the system is trying to energise the plugs, but as they are kaput they don't heat. If the sensor was reading incorrectly then there would be no voltage to the plugs?

Therefore i conclude there would be no mileage in me changing the water temp sensor?

Cheers Nick
 MY16 D4 Landmark SDV6 (The Ice Maiden)
Uncle Ray's spare wheel protector
MY08 D3 HSE Stornoway (Miss Moneypit) The money tree withered...... 
 
Post #193153229th Mar 2018 8:04 pm
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 327

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

Yep just get a 5000ohm resistor unplug the temp sender poke the resistor across the pins see if the temp gauge is reading around normal and start the engine if it does, put the resistor in more permanent with a switch and that's it
  
Post #193153829th Mar 2018 8:14 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Skagg - If you have voltage at the plugs the temp sensor is doing its job.
No resistance across the glowplugs means they are faulty. Very common. Should be about 1R when engine cold
  
Post #193163530th Mar 2018 8:53 am
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Skagg
 


Member Since: 15 May 2015
Location: Not where i'd like to be
Posts: 1023

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Yulong WhiteDiscovery 4

Cheers for the reply Pete.

I thought so.. There goes the quick fix Smile
 MY16 D4 Landmark SDV6 (The Ice Maiden)
Uncle Ray's spare wheel protector
MY08 D3 HSE Stornoway (Miss Moneypit) The money tree withered...... 
 
Post #193163630th Mar 2018 8:55 am
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 327

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

Frosty this morning so tried it. ....not starting Sad
unplugged the temp sensor in the top hose popped in a 7000ohm resistor I found really needed a 5000ohm but all I had looked at the temp gauge reading just above cold but below normal turned the key .........it started Whistle

So no need for any glow plugs or preheating using the fbh
All I need is to make it look tidy and put a switch in so I don't even have to lift the bonnet

The air temp said -2 this morning
Sorted thank you Pete K for your help Thumbs Up
total cost under a fiver
  
Post #193174030th Mar 2018 1:20 pm
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daftlad
 


Member Since: 12 Jun 2016
Location: Worksop , Nottinghamshire
Posts: 712

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Hi guys
Old post I know however when I looked for the sensor my 2009 doesn’t seem to have it in the same location
Anyone know where it is on later models please
Cheers
Phil
  
Post #202410631st Jan 2019 6:57 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

sensor isn't far away, more over to drivers side?

In the other thread someone is using a 2200 ohm? resistor, which should be easier to get and is closer to the "pour water on outside of sensor" reading
  
Post #202416031st Jan 2019 9:31 pm
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Diekes
 


Member Since: 23 Sep 2015
Location: Flanders
Posts: 149

Belgium 2008 Discovery 3 TDV6 HSE Auto Sumatra BlackDiscovery 3
Re: Discovery 3 Cold Start problem - my temporary solution

4TRAX wrote:
I have had the cold start problem for a few winters. I decided to make a short video documenting the problem and where I believe the fault lies, at least in my vehicle. Looks to be the engine coolant temp sensor - not sure if replacing it will solve the problem, so any suggestions from members of DISCO3 would be appreciated Smile



looked at the video... could be a temp solution for me too, but can't locate this sensor on my LR 3 from 2008... Embarassed Embarassed Embarassed
  
Post #20242261st Feb 2019 8:27 am
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daftlad
 


Member Since: 12 Jun 2016
Location: Worksop , Nottinghamshire
Posts: 712

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

As above from my post bud
It’s on the other side I’ve yet to look properly but did glance when I first looked and it must be hiding Rolling with laughter
  
Post #20243661st Feb 2019 3:42 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

  
Post #20243761st Feb 2019 4:07 pm
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daftlad
 


Member Since: 12 Jun 2016
Location: Worksop , Nottinghamshire
Posts: 712

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Cheers Pete
Is that the little Censored with the white wire coming out
Phil
  
Post #20243861st Feb 2019 4:45 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10336

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

yes
  
Post #20243901st Feb 2019 4:54 pm
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Diekes
 


Member Since: 23 Sep 2015
Location: Flanders
Posts: 149

Belgium 2008 Discovery 3 TDV6 HSE Auto Sumatra BlackDiscovery 3

yep, thats the one. Put a hairdryer on it for five minutes and the car started as normal...
  
Post #20244061st Feb 2019 5:32 pm
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 327

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3
fit a resistor across it and a switch

-2 this morning none starter flick the switch and it starts ....like magic, no hair dryers, boiling water, timers, heaters and no glow plugs either Very Happy Very Happy Very Happy Very Happy Very Happy Very Happy
  
Post #21030992nd Dec 2019 2:04 pm
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