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do diesels have knock sensors
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jack19823756
 


Member Since: 12 Jan 2017
Location: Norfolk
Posts: 8

United Kingdom 
do diesels have knock sensors

never really thought about it til now but do TDI's or any diesel engines for that matter have knock sensors im curious to know  
Post #176226412th Jan 2017 5:08 pm
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

Yes they can and yes they can - including the D3 (item 1):




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Post #176227212th Jan 2017 5:26 pm
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jack19823756
 


Member Since: 12 Jan 2017
Location: Norfolk
Posts: 8

United Kingdom 

so the D3 has a knock sensor hmmm you learn something new everyday thanks  
Post #176227312th Jan 2017 5:27 pm
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

Thumbs Up Land Rover - Turning Drivers into Mechanics Since 1948

Battery & Quiescent Current Drain Testing

Diagnostics for:
Defender, FL2, D3, D4, Evoque, RRS & FFRR
A not-for-profit enterprise

  
Post #176227412th Jan 2017 5:29 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
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England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

are you replacing lots of sensors ? Question  
Post #176228212th Jan 2017 5:42 pm
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jack19823756
 


Member Since: 12 Jan 2017
Location: Norfolk
Posts: 8

United Kingdom 

hah i wish im just a student studdying vehicle diagnostics

was just a general question really  
Post #176241712th Jan 2017 8:29 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20862

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Early 2.7 engines have knock sensors. Later models don't

Obviously not needed Laughing My D3 Build Thread

TDV8 Retrofit Build Thread  
Post #176242412th Jan 2017 8:33 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8244

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

Interesting, but what does a knock sensor do?- no wise cracks please Laughing It can when others can't,
It will when others won't,
It goes where others don't.  
Post #176246612th Jan 2017 9:25 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10759

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

It's a microphone which listens for pre detonation on a petrol car.  
Post #176247112th Jan 2017 9:31 pm
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jack19823756
 


Member Since: 12 Jan 2017
Location: Norfolk
Posts: 8

United Kingdom 

M3DPO wrote:
Interesting, but what does a knock sensor do?- no wise cracks please Laughing


it listens for vibrations caused by engine knock and determines whether the spark timing or air fuel ratio needs to be retarded as far as i know  
Post #176251312th Jan 2017 10:40 pm
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