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DISCO3.CO.UK > Technical (D4)

Manifold/turbo query
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tallhighlander
 


Member Since: 13 Dec 2015
Location: Highlands
Posts: 23

Scotland 2010 Discovery 4 3.0 TDV6 GS Auto Bali BlueDiscovery 4
Manifold/turbo query

Had my D4 show "Restricted performance" gizmo; so bought a diagnostic tool, plugged her in and Ive got this:
1. Manifold absolute pressure - mass or volume air flow correlation
2. Mass or volume air flow A circuit range/performance - Airflow too high
3. Turbo boost pressure low
4. Turbo/supercharger boost sensor A circuit
5. Fan 1 control circuit

Now what I want to know is: what does this tell me?

And b): can I erase these/is this advisable?

Much obliged 3 x TD5s + 2 x D3s; now upgraded to a D4 after a 3 month flirt with a VW Toerag...  
Post #230207729th Jul 2022 4:10 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20732

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Favourite culprit is a seized TSOV, at the bottom of the rad pack.
Pivot seizes up, and causes those codes

If that is OK, then we're looking at a boost leak someplace

If the smoke test comes back OK, we're then into in depth diag/live data etc

Thumbs Up My D3 Build Thread

TDV8 Retrofit Build Thread  
Post #230208429th Jul 2022 4:36 pm
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tallhighlander
 


Member Since: 13 Dec 2015
Location: Highlands
Posts: 23

Scotland 2010 Discovery 4 3.0 TDV6 GS Auto Bali BlueDiscovery 4

Thanks for that. Forgive my ignorance, but what is a TSOV? 3 x TD5s + 2 x D3s; now upgraded to a D4 after a 3 month flirt with a VW Toerag...  
Post #230214730th Jul 2022 8:09 am
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Flack
 


Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 6235

England 2007 Discovery 3 TDV6 XS Auto Stornoway GreyDiscovery 3

Quote:
Thanks for that. Forgive my ignorance, but what is a TSOV?


Turbo Shot Off Valve.

Flack Thumbs Up  
Post #230214830th Jul 2022 8:28 am
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tallhighlander
 


Member Since: 13 Dec 2015
Location: Highlands
Posts: 23

Scotland 2010 Discovery 4 3.0 TDV6 GS Auto Bali BlueDiscovery 4

Thank you sir 3 x TD5s + 2 x D3s; now upgraded to a D4 after a 3 month flirt with a VW Toerag...  
Post #230229731st Jul 2022 1:33 pm
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RogB
 


Member Since: 15 Jun 2018
Location: Mansfield
Posts: 1651

United Kingdom 

depending on how close you are to Dundee why not drop into Disco Mikeys garage, Ive heard hes rather good at working on Land Rovers Very Happy 2011 D4 XS 305 MY12 - gone but not forgotten  
Post #23023931st Aug 2022 7:56 am
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tallhighlander
 


Member Since: 13 Dec 2015
Location: Highlands
Posts: 23

Scotland 2010 Discovery 4 3.0 TDV6 GS Auto Bali BlueDiscovery 4

Dundee is 4 hours south!
But thank you for suggestion 3 x TD5s + 2 x D3s; now upgraded to a D4 after a 3 month flirt with a VW Toerag...  
Post #23023941st Aug 2022 7:59 am
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20732

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Was up in Inverness last week too Whistle My D3 Build Thread

TDV8 Retrofit Build Thread  
Post #23024441st Aug 2022 1:07 pm
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12721

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

tallhighlander wrote:
Dundee is 4 hours south!
But thank you for suggestion


Probably longer in "reduced performance" mode Sad  
Post #23024461st Aug 2022 1:27 pm
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mjt989
 


Member Since: 06 Oct 2023
Location: Oxfordshire
Posts: 5

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Loire BlueDiscovery 4

Hi guys, any tips on how to free up a sticky TSOV (first time LR owner here), I’ve got DTCs which I think point to the TSOV:

P004B-77 Turbocharger boost control solenoid B - circuit range/performance

P259B-71 Turbocharger boost control position sensor B performance - stuck high

Thank you!  
Post #235097821st Oct 2023 9:33 am
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