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DISCO3.CO.UK > Technical (D4)

Injector coding
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Jimbob42
 


Member Since: 23 Mar 2022
Location: Leicester
Posts: 179

2005 Discovery 3 TDV6 SE Auto Tonga GreenDiscovery 3
Injector coding

So I have just swapped in the jag donor engine complete with injectors. I’ve written the codes down while I could see them. It seems to take a few turns to start, but I’m not sure if that’s because I’ve not coded them yet. Is that possible?  
Post #23808882nd Nov 2024 9:48 pm
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defector
 


Member Since: 23 Feb 2009
Location: Greater Manchester
Posts: 1471

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

As far as I'm aware, no coding required.  
Post #23808973rd Nov 2024 2:07 am
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Sundayjumper
 


Member Since: 23 Sep 2024
Location: Berkshire
Posts: 101

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Indus SilverDiscovery 4

As far as I'm aware, injectors always need coding. The amount of fuel delivered needs to be measured extremely precisely and manufacturing tolerances aren’t quite enough. So they’re made, measured, and a code marked on each individual injector that describes the flow behaviour of that specific injector. The ECU needs those codes to work out the length of time to fire the injector to deliver the right amount of fuel.  
Post #23809093rd Nov 2024 10:31 am
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 5036

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

No coding required for D3. Thumbs Up yµ (idµ - eAµ) ψ=mψ

  
Post #23809153rd Nov 2024 11:26 am
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Jimbob42
 


Member Since: 23 Mar 2022
Location: Leicester
Posts: 179

2005 Discovery 3 TDV6 SE Auto Tonga GreenDiscovery 3

This relates to the D4 I’ve just done. I’m sure they start and run uncoded, but wonder if the slightly long cranking is due to them not being coded yet. Been tidying up bits after the body off.  
Post #23809543rd Nov 2024 9:28 pm
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stephenw46
 


Member Since: 22 Jun 2011
Location: West Midlands
Posts: 1214

United Kingdom 2014 Discovery 4 3.0 TDV6 XS Auto Corris GreyDiscovery 4

They have codes and the option to code them for a reason, all a diesel engine requires is compression and diesel and in the cold working glow plugs good luck  
Post #23809553rd Nov 2024 10:01 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 5036

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

OK I wasn't aware you were referring to a D4 and so yes it does indeed need injector coding even though it will run without doing so.

Very likely to be contributing to your poor starting which should be almost instant. Thumbs Up

D3 does NOT require coding. yµ (idµ - eAµ) ψ=mψ

  
Post #23809563rd Nov 2024 10:04 pm
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Jimbob42
 


Member Since: 23 Mar 2022
Location: Leicester
Posts: 179

2005 Discovery 3 TDV6 SE Auto Tonga GreenDiscovery 3

Cheers. Will do it tomorrow. I have Icarsoft so will be interesting to see how it shows injector numbering etc! Do you know if all tools use the same logic for injector numbering by any chance?  
Post #23809583rd Nov 2024 10:11 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 5036

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Cylinder designation is not the same as injector designation so be aware of that before you begin. If you do a search on here the designations for both should pop up. Thumbs Up yµ (idµ - eAµ) ψ=mψ

  
Post #23809593rd Nov 2024 10:15 pm
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stephenw46
 


Member Since: 22 Jun 2011
Location: West Midlands
Posts: 1214

United Kingdom 2014 Discovery 4 3.0 TDV6 XS Auto Corris GreyDiscovery 4

I have a icarsoft that I use on the wife’s car and I recoded my friends vw camper after a so called mechanic fitted him two new injectors and didn’t bother easy process good luck  
Post #23810525th Nov 2024 10:42 am
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Jimbob42
 


Member Since: 23 Mar 2022
Location: Leicester
Posts: 179

2005 Discovery 3 TDV6 SE Auto Tonga GreenDiscovery 3

Icarsoft 2 wouldn’t work. Let me put number in but when I saved I got an application failed error.  
Post #23810855th Nov 2024 6:08 pm
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