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info on glow plugs
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Redgull
 


Member Since: 30 Aug 2013
Location: East Sussex
Posts: 1127

2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3
info on glow plugs

hi guys,as i have been a petrol head all my life and now have a tdv6 can somebody explain the full workings of glowplugs,as mine now smokes in cold mornings(smoke not steam) but nothing else for rest of the day, no loss of coolant, so i guess glowplugs, starts first time every time, how do these plugs work and why smoke, i know they heat diesel, so a plug or two that dont work leaves cold diesil is that what makes smoke??? Embarassed teach me guys Bow down  
Post #13857488th Dec 2014 6:35 pm
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Flack
 


Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 6299

England 2007 Discovery 3 TDV6 XS Auto Stornoway GreyDiscovery 3

Yes you will get smoke if you have some glowplugs down as the diesel has not burnt on startup, the cycle for the plugs is controlled by the engine ecu that gets information from a few temp sensors around the car, It then decides the amount of fuel and sets the timer for the glowplugs.

Flack Thumbs Up  
Post #13857568th Dec 2014 7:01 pm
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Russell
 


Member Since: 24 Aug 2007
Location: Kent
Posts: 10564

United Kingdom 

Where is it smoking from, rear exhausts or under NSF wing. MY17 D5 1st Edition Namib Orange
MY15 D4 HSE Kaikoura Stone
MY12 D4 HSE Nara Bronze Sold and gone
MY11 D4 HSE Stornaway Grey Sold and gone
D3 S spec Silver Sold and gone
Tow bar, full length roof bars, side steps, tow bar storage unit, surround camers.
D4 camera club  
Post #13857588th Dec 2014 7:02 pm
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Redgull
 


Member Since: 30 Aug 2013
Location: East Sussex
Posts: 1127

2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

hi flack, how do you get smoke from unburnt diesel?  
Post #13857598th Dec 2014 7:03 pm
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Redgull
 


Member Since: 30 Aug 2013
Location: East Sussex
Posts: 1127

2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

russel, not the fbh, from exhaust Thumbs Up  
Post #13857608th Dec 2014 7:06 pm
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Flack
 


Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 6299

England 2007 Discovery 3 TDV6 XS Auto Stornoway GreyDiscovery 3

Because the plugs are not heating fully so the fuel is not fully burnt ... I have one or two glow plugs down on my car and it to smokes on initial startup

Flack Thumbs Up  
Post #13857618th Dec 2014 7:08 pm
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Redgull
 


Member Since: 30 Aug 2013
Location: East Sussex
Posts: 1127

2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

hi flack, i know you are right Thumbs Up just trying to get my head around unburnt fuel creating more smoke Embarassed you would think more burning more smoke,  
Post #13857658th Dec 2014 7:19 pm
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Nodge68
 


Member Since: 05 Sep 2014
Location: Newquay
Posts: 1014

England 2005 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3

It depends on the colour of the smoke at to the exact science. White smoke from cold is often finely atomized unburned fuel. Black smoke is partially burnt fuel, ie it didn't create enough heat to burn cleanly.
White smoke with a hot engine but cold atmosphere is generally water vapour. Freelander SE 2005 Auto.
D3 TDV6. Gone.  
Post #13857718th Dec 2014 7:28 pm
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Redgull
 


Member Since: 30 Aug 2013
Location: East Sussex
Posts: 1127

2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

mine is white smoke from cold Thumbs Up not water vapor  
Post #13857748th Dec 2014 7:31 pm
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Barn1e
D3 Decade 


Member Since: 28 Aug 2006
Location: Mid-sussex
Posts: 2021

United Kingdom 2005 Discovery 3 TDV6 S Auto Tonga GreenDiscovery 3

I have one failed plug and also get the White stuff. Soon passes. 2005, TDV6 S, Auto, 190k miles, owned from new, V8 Brake Upgrade, Nancom Evo, RLD protector, BAS EGR blanking & Remap, separate ATF cooler, changing all the fluids ahead of time.  
Post #13857868th Dec 2014 7:57 pm
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Sydney
 


Member Since: 11 Aug 2013
Location: St Neots
Posts: 903

United Kingdom 2006 Discovery 3 TDV6 Base 7 Seat Manual Zermatt SilverDiscovery 3

In this cold spell I get a bit of smoke and lumpy running for a few seconds, guessing one or two of the plugs are on their way out. No doubt the rest may follow.

Best get my FBH working and a BAS remote kit fitted, cheaper than new plugs!!! De-Tango
V8 Brakes
EGRs blanked
Running boards
3 flash indicators and clock on dash
Blingy grille...  
Post #13858548th Dec 2014 9:40 pm
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Nodge68
 


Member Since: 05 Sep 2014
Location: Newquay
Posts: 1014

England 2005 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3

Redgull wrote:
mine is white smoke from cold Thumbs Up not water vapor


Unburned vaporised fuel it is then.
This will pass once the cylinder temperature climbs enough to fire the fuel.
All the glow plug does is preheat the cylinder to fire the fuel from cold. Freelander SE 2005 Auto.
D3 TDV6. Gone.  
Post #13858688th Dec 2014 10:00 pm
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