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Kenny57
Member Since: 12 Apr 2020
Location: Essex
Posts: 169
  
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| IID Aux Heater Operation Check as Emergency Parking Heater |
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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
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 9th Dec 2020 11:43 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
 
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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
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| 10th Dec 2020 12:02 am |
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Kenny57
Member Since: 12 Apr 2020
Location: Essex
Posts: 169
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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 10th Dec 2020 12:21 am. Edited 1 time in total
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| 10th Dec 2020 12:14 am |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
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No. Changing the coolant sensor temperate changes the amount of fuel injected into engine and the engine magically starts.
See link and video
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| 10th Dec 2020 12:16 am |
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Kenny57
Member Since: 12 Apr 2020
Location: Essex
Posts: 169
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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 
Edit, Edit... and thank you for answering my question on the IID function test, sorry I didn't see that line at first.
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| 10th Dec 2020 12:23 am |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
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If you carry on reading the thread.
The solution is perfected by adding a button and resistor.
No need to open bonnet !
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| 10th Dec 2020 12:34 am |
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Kenny57
Member Since: 12 Apr 2020
Location: Essex
Posts: 169
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Well  me, it only bloody works!! 
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.
Now where's that box of resistors I had lying round somewhere....
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| 10th Dec 2020 11:11 am |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
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| Re: IID Aux Heater Operation Check as Emergency Parking Heater |
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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
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| 10th Dec 2020 1:32 pm |
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Kenny57
Member Since: 12 Apr 2020
Location: Essex
Posts: 169
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Oooo.... now that's a great shout! Ordered. Thank you kind sir 
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| 10th Dec 2020 3:46 pm |
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