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Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridgeshire
Posts: 2180

United Kingdom 2007 Range Rover Vogue SE 4.2 SC V8 Zermatt Silver
Dimming dash?

Hi all

The dash sims intermittently any ideas? If you look on the video I’m at idle? It’s in the check control window mainly

 Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Post #461823 22nd Dec 2017 3:39pm
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stan
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i'd check the alternator and make sure its a steady and not a fluctuating output.. ... - .- -.




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Post #461825 22nd Dec 2017 3:59pm
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Rambles



Member Since: 16 Apr 2011
Location: UK
Posts: 757

2011 Range Rover Vogue SE TDV8 Stornoway Grey

Maybe because the fuel gauge shows empty...

Post #461845 22nd Dec 2017 7:37pm
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Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridgeshire
Posts: 2180

United Kingdom 2007 Range Rover Vogue SE 4.2 SC V8 Zermatt Silver

It lives on empty lol it’s on gas that’s why - no need to carry excess weight Wink will check alt output - can I just chuck a voltmeter in the lighter socket? Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Post #461850 22nd Dec 2017 7:50pm
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doclees



Member Since: 24 Jun 2015
Location: PA
Posts: 672

United States 2004 Range Rover HSE 4.4 V8 Java Black

Mine dims a bit with lights and fog lights on at idle. Still charging OK. As for running with less than 1/4 tank it stresses the fuel pump and causes it to run hotter and shortens its life. Just keep the extra 38 lbs in the tank and leave the spare tire home.

Post #461878 22nd Dec 2017 9:13pm
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Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridgeshire
Posts: 2180

United Kingdom 2007 Range Rover Vogue SE 4.2 SC V8 Zermatt Silver

Does it still steer the fuel pump on lpg? Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Post #462298 27th Dec 2017 12:33pm
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Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridgeshire
Posts: 2180

United Kingdom 2007 Range Rover Vogue SE 4.2 SC V8 Zermatt Silver

Also notice I can do this on demand by turning both windscreen heaters on at the same time with the headlights on Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Post #463565 6th Jan 2018 11:09pm
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holidaychicken



Member Since: 06 Nov 2013
Location: Kent
Posts: 1086

United Kingdom 2004 Range Rover Vogue 4.4 V8 Java Black

My 04,was doing that today when my battery terminal was a little loose and battery was down on charge

Post #463575 7th Jan 2018 12:49am
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miggit



Member Since: 12 Jul 2014
Location: Milton Keynes
Posts: 3657

United Kingdom 

Danwilderspin wrote:
Also notice I can do this on demand by turning both windscreen heaters on at the same time with the headlights on


That would indicate that you should start saving for an alternator as it's getting a bit tired Thumbs Up Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

Post #463596 7th Jan 2018 9:12am
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Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridgeshire
Posts: 2180

United Kingdom 2007 Range Rover Vogue SE 4.2 SC V8 Zermatt Silver

If I’m honest it’s done that just never mentioned for about 18mths since I had it... if it had a cheap alt replacement could this do it? Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Post #463654 7th Jan 2018 4:28pm
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miggit



Member Since: 12 Jul 2014
Location: Milton Keynes
Posts: 3657

United Kingdom 

Possibly, if it's working then don't fix!! Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

Post #463663 7th Jan 2018 5:15pm
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fisha



Member Since: 25 Sep 2009
Location: Scotland
Posts: 1220

2015 Range Rover Autobiography SDV8 Aruba

At idle, alternators generally only just manage to provide sufficient power due to the low rpm. They have a curved output Vs rpm graph which rises quickly and then flattens off. At low rpm such as idle the alt will be right in that steep curve section where the difference of a few hundred rpm could make a difference of 10's of amps.

So at idle when you've got heaters and blowers and wipers , ights radio etc etc, that alternator is being used to the limit of its output (at that rpm) and so not all systems will get a full clean supply, hence the dimming.

In a cold frosty start I generally hold the revs up at 1250 to 1500rpm not so much to get the engine warm quicker, mbut also to make the alt work in a more productive zone so that the electric systems work well. V8 or else ...

Post #463679 7th Jan 2018 6:49pm
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Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridgeshire
Posts: 2180

United Kingdom 2007 Range Rover Vogue SE 4.2 SC V8 Zermatt Silver

hi all - read the voltage finally - although typically it ant very dimmy today maybe didn't notice as much as its light. Anyway battery when off 12.1 volts when on and running for a couple of minutes 14.2-14.3 volts fairly consistent thought the range... Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Post #466469 29th Jan 2018 1:13pm
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