Car goes nuts then all ok. Any ideas?

nick46 · 05-18-2021, 12:21 PM

Don't think its got that. I'm getting it checked out this evening. Recon a new alternator is on the cards!

nick46 · 05-18-2021, 01:46 PM

Well thats odd. Just had a meter on it and its 14v. Carly is also now saying 14v. Gonna keep a close eye on this.

Tambohamilton · 05-18-2021, 05:01 PM

Run the vin through whatever decoder you fancy. If it has the regenerative braking option, it'll try to maintain battery level at around 80%, so charging will cut in and out. This is so that it can charge at full rate on overrun/braking, in order to recover maximum energy.

nick46 · 05-19-2021, 01:32 AM

Well I take it back. Just checked my vin in a couple of decoders and my car apparently does have 'Brake Energy Regeneration'!

Tambohamilton · 05-19-2021, 02:18 AM

That would explain why it wants an AGM battery then, too. I reckon all is well

0l0dom0l0 · 05-19-2021, 03:05 AM

If you're not sure you can get a new voltage regulator for the alternator (instead of replacing the whole thing). It is often only the voltage regulator that fails.

nick46 · 05-19-2021, 06:22 AM

Quote:

Originally Posted by Tambohamilton

That would explain why it wants an AGM battery then, too. I reckon all is well

The battery that came out of it was a lead acid type.

Tambohamilton · 05-19-2021, 06:41 AM

ok, I have no idea

05-18-2021, 12:21 PM	#23
nick46 Captain 338 Rep 640 Posts Drives: Bmw E91 lci 330d msport Join Date: Aug 2017 Location: Bridgwater iTrader: (0)	Don't think its got that. I'm getting it checked out this evening. Recon a new alternator is on the cards!
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05-18-2021, 01:46 PM	#24
nick46 Captain 338 Rep 640 Posts Drives: Bmw E91 lci 330d msport Join Date: Aug 2017 Location: Bridgwater iTrader: (0)	Well thats odd. Just had a meter on it and its 14v. Carly is also now saying 14v. Gonna keep a close eye on this.
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05-18-2021, 05:01 PM	#25
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Run the vin through whatever decoder you fancy. If it has the regenerative braking option, it'll try to maintain battery level at around 80%, so charging will cut in and out. This is so that it can charge at full rate on overrun/braking, in order to recover maximum energy.
	Appreciate 0 Quote

05-19-2021, 01:32 AM	#26
nick46 Captain 338 Rep 640 Posts Drives: Bmw E91 lci 330d msport Join Date: Aug 2017 Location: Bridgwater iTrader: (0)	Well I take it back. Just checked my vin in a couple of decoders and my car apparently does have 'Brake Energy Regeneration'!
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05-19-2021, 02:18 AM	#27
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	That would explain why it wants an AGM battery then, too. I reckon all is well
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05-19-2021, 03:05 AM	#28
0l0dom0l0 First Lieutenant 69 Rep 316 Posts Drives: BMW E92 330i Join Date: Jun 2020 Location: Uk iTrader: (0)	If you're not sure you can get a new voltage regulator for the alternator (instead of replacing the whole thing). It is often only the voltage regulator that fails.
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05-19-2021, 06:41 AM	#30
Tambohamilton Brigadier General 3058 Rep 3,909 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	ok, I have no idea
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