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 NickMY16 D4 Landmark SDV6 (The Ice Maiden)
Uncle Ray's spare wheel protector
MY08 D3 HSE Stornoway (Miss Moneypit) The money tree withered......
29th Mar 2018 8:04 pm
Flapper
Member Since: 04 Feb 2015
Location: Gloucester
Posts: 327
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
29th Mar 2018 8:14 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10337
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
I thought so.. There goes the quick fix MY16 D4 Landmark SDV6 (The Ice Maiden)
Uncle Ray's spare wheel protector
MY08 D3 HSE Stornoway (Miss Moneypit) The money tree withered......
30th Mar 2018 8:55 am
Flapper
Member Since: 04 Feb 2015
Location: Gloucester
Posts: 327
Frosty this morning so tried it. ....not starting
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
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
total cost under a fiver
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
31st Jan 2019 6:57 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10337
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
31st Jan 2019 9:31 pm
Diekes
Member Since: 23 Sep 2015
Location: Flanders
Posts: 149
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
looked at the video... could be a temp solution for me too, but can't locate this sensor on my LR 3 from 2008...
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