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IID Aux Heater Operation Check as Emergency Parking Heater
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Kenny57
 


Member Since: 12 Apr 2020
Location: Essex
Posts: 173

United Kingdom 2007 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3
IID Aux Heater Operation Check as Emergency Parking Heater

Hi,

so with my MY2007 D3 getting more and more difficult to start as the weather gets colder, I've followed Robbie's guide to glow plug diagnostics and sadly I have NO working glow plugs.

At the moment it will start if I've had it in the garage for the night, but I don't want go anywhere where I'd have to leave it long enough to fully cool down in case it won't restart! Its making me very nervous about taking it out at all.

As a stop-gap until I get the glow plugs sorted I've ordered an FBH remote start kit from Romania, but don't know how long that's going to take.

So... I was just wondering, as a stop-gap stop-gap, if I could use my IID FBH function test as a way to get it warmed up and get me home if I go out and it did cool down too much to start? The IID manual says that I only need the ignition on (doesn't say engine running) and the HVAC off to do the test, but it doesn't say how long the test can be run for, or much else about it. Anyone tried it or got any thoughts please?

Ken
  
Post #21928049th Dec 2020 10:43 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10742

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

It only runs for 1 minute I think.


So they only fail to start if the temp is 0 DegC or less.

The tricks are :

1a pour boiling hot water on the coolant temp sensor.
1b fit a resistor and push button to emulate the above.

https://www.disco3.co.uk/forum/disco-3-not...78409.html



2 if you get desperate. Disconnect air pipe from filter and using a hair dryer blow hot air in
  
Post #21928079th Dec 2020 11:02 pm
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Kenny57
 


Member Since: 12 Apr 2020
Location: Essex
Posts: 173

United Kingdom 2007 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Hi Pete, thanks for the reply. But now I'm confused.

Are you saying that just by turning ignition on and fooling the temperature sensors the FBH will start up? I thought it only worked a couple of minutes after the engine is started.

Cheers
Ken

EDIT : Ok so now after watching the vid and reading the thread I'm even more confused. How on earth does fooling the cooling temperature sensor warm the cylinders up enough to get the diesel to ignite when you crank the engine. Surely if that worked there'd be no need to fit glow plugs to diesels!!
 

Last edited by Kenny57 on 9th Dec 2020 11:21 pm. Edited 1 time in total 
Post #21928109th Dec 2020 11:14 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10742

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

No. Changing the coolant sensor temperate changes the amount of fuel injected into engine and the engine magically starts.

See link and video
  
Post #21928129th Dec 2020 11:16 pm
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Kenny57
 


Member Since: 12 Apr 2020
Location: Essex
Posts: 173

United Kingdom 2007 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

LOL did and replied just as you did.

So can anybody explain this "magical" replacement for glow plugs?

Edit.... and even if it does, it means I can only go places with a kettle I can use Rolling with laughter

Edit, Edit... and thank you for answering my question on the IID function test, sorry I didn't see that line at first.
  
Post #21928139th Dec 2020 11:23 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10742

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

If you carry on reading the thread.
The solution is perfected by adding a button and resistor.

No need to open bonnet ! Rolling with laughter
  
Post #21928169th Dec 2020 11:34 pm
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Kenny57
 


Member Since: 12 Apr 2020
Location: Essex
Posts: 173

United Kingdom 2007 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Well Censored me, it only bloody works!! Shocked

5deg outside this morning so took a kettle of hot water out. Tried starting it.... nothing. So popped the bonnet and didn't even need to mess with the engine cover. LR decided to put the coolant sensor on the other side of the rad on my car, all nice and accessible. Poured the hot water, gave it a few seconds then tried again. Hey presto it started! Bit lumpy for a minute or so, but then smoothed out and was happy as Larry.

So there was me thinking I know a bit about cars and engines and looking forward to getting my teeth into how my Disco works and it seems I'm wasting my time. I need to get on the next train to Hogwarts if I want any chance of understanding it.

Big Cry Big Cry Big Cry Big Cry Big Cry

Now where's that box of resistors I had lying round somewhere....
  
Post #219288110th Dec 2020 10:11 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10742

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3
Re: IID Aux Heater Operation Check as Emergency Parking Heater

5K1 resistor


Kenny57 wrote:

As a stop-gap until I get the glow plugs sorted I've ordered an FBH remote start kit from Romania, but don't know how long that's going to take.


Spend £6 to covert it to a remote kit, once its up and running.

https://www.ebay.co.uk/itm/133509320129
  
Post #219290210th Dec 2020 12:32 pm
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Kenny57
 


Member Since: 12 Apr 2020
Location: Essex
Posts: 173

United Kingdom 2007 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Oooo.... now that's a great shout! Ordered. Thank you kind sir Very Happy
  
Post #219293110th Dec 2020 2:46 pm
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