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ReadySalted
Member Since: 03 Oct 2018
Location: Hereford
Posts: 53
  
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So a few weeks ago the disco wouldn't start when it was about -3 degrees. It was turning over but wouldn't fire at all. RAC arrived and hooked up battery booster which had no effect, but it started as soon as he applied some throttle while cranking. He said it could be glow plugs on their way out (although it did have its 90k cambelt service 3 months ago so not sure if they were done then).
Anyway it's been fine since but I have only been using it about twice a week for short journeys round town. I last used it Thursday though for a good hours drive. This morning it started fine as usual but after about 5 miles it said 'low voltage' on the radio, and it muted itself. After another 30 minutes driving I restarted to see it had changed, but this time the satnav screen was black as well. I drove home and left the car running on the drive for about another 30 minutes.Then after it had sat for 2 hours I went and used the menu on the car to look at the battery voltage (I don't have a multimeter). (This time the radio and satnav came on as normal).
Key in ignition, engine off - 12.6V
Engine started - 13.8V
Engine on for 5 minutes - 13.8V
Those readings are probably slightly inaccurate but do strike me as fairly low. The starting issue a few weeks back may have been isolated and just down to the cold temps or something else unrelated, but I'm now wondering if the low voltage is due to a fooked alternator, or atleast it not working properly??????
(PS. RAC man said battery is fairly new. No idea how he could tell!) Discovery 3 XS - sold
L322 Range Rover Vogue - sold
TD5 Defender 90 - sold
200tdi Defender 110 - sold
300tdi disco ES - died
Series 3 88" Petrol - sold
300tdi disco XS - sold
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 17th Feb 2019 3:52 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10414
 
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voltages don't seam too bad.
glowplugs don't get done with the cambelt
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| 17th Feb 2019 4:18 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8143
 
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Buy a decent battery charger and use it regularly if you only do short trips  It can when others can't,
It will when others won't,
It goes where others don't.
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| 17th Feb 2019 10:44 pm |
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zinke
Member Since: 22 Feb 2014
Location: Scunthorpe
Posts: 584
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The voltage without it running seems pretty good pointing towards the battery being in ok shape (i did say pointing towards before anybody says anything) but the voltages with the engine running are very low, i would expect to 14.5-15V if the weather is cold. My first thoughts are alternator is on its way out.
Pete. IID, webasto software and workshop facility's available.
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| 18th Feb 2019 12:50 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8143
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+1 It can when others can't,
It will when others won't,
It goes where others don't.
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| 18th Feb 2019 12:58 pm |
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ReadySalted
Member Since: 03 Oct 2018
Location: Hereford
Posts: 53
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Thanks for responses guys.
I've been monitoring it on most drives the last week or so and the reading while driving generally stays around 14.2 only fluctuating by about 0.2 volts either way, so I'm reasonably confident all is well. No idea why the voltage dropped so low when I had the symptons, but perhaps it was just down to not enough long journeys.
In other news, I heard a 'bong' yesterday but no message or lights and then about 20 minutes later the engine light came on. It's come on once before, and went off when I re-seated the fuel cap so I'm not panicking just yet. My first thought is EGR though as it was cleaned in October and was VERY gunky, and I have noticed that it's quite laggy when pulling off. But anyway, battery not much of a concern any more. Thanks! Discovery 3 XS - sold
L322 Range Rover Vogue - sold
TD5 Defender 90 - sold
200tdi Defender 110 - sold
300tdi disco ES - died
Series 3 88" Petrol - sold
300tdi disco XS - sold
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| 25th Feb 2019 4:30 pm |
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ReadySalted
Member Since: 03 Oct 2018
Location: Hereford
Posts: 53
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Apologies to reply to my own post, but just for the benefit of anybody who finds this by searching in future - My engine light mentioned above went off after 2 small journeys of about 3 miles. I have no idea why, or whether it will return soon. It may have been fixed by replacing the fuel cap like it was last time, it may have been because I drove it for about a mile in command shift mode, or something completely unknown. But anyway, nothings worse than a topic with nobody posting an outcome and mine is that the battery voltage seems okay, and the engine light is off. Hallelujah. Discovery 3 XS - sold
L322 Range Rover Vogue - sold
TD5 Defender 90 - sold
200tdi Defender 110 - sold
300tdi disco ES - died
Series 3 88" Petrol - sold
300tdi disco XS - sold
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| 26th Feb 2019 11:03 am |
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