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      01-15-2019, 11:08 PM   #1
HolyChitMeng
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Car Dies after extended idle?

Hey guys, so after idling for an extended period of time, like 20-25 minutes (Have had to wait for some people for a while) and then continue to drive the car, after idling for so long, the car for some reason will throw every error in the book. Radio dies and my hardwired V1 also loses power. It seems as that everything electrical loses power... gauges turn off and then Power Steering dies. Then the car goes into limp mode, and then ultimately dies. The car then wont restart immediately, and then after about 5 minutes the car will struggle to restart but it does restart. The car starts up as if the battery was disconnected (Time and Date resets, trip resets, as well as MPG etc.)
Anyone have an idea of what could be the issue? Voltage Regulator/Alternator?
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      01-16-2019, 07:00 AM   #2
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I think you've answered your own question as where to start first. Power supply and storage.
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      01-16-2019, 07:23 PM   #3
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Your car needs a new battery. You're welcome.
The battery is less than a year old, oe bmw, and registered. So should I rule it out?
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      01-16-2019, 07:23 PM   #4
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Originally Posted by deansbimmer View Post
I think you've answered your own question as where to start first. Power supply and storage.
I wasn’t sure, I bought a new alternator, going to instal it this weekend. I hope it’s not the battery since it’s pretty new.
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      01-16-2019, 08:05 PM   #5
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Seems like an ibs error.
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      01-17-2019, 06:07 AM   #6
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Check the battery using the old faithful dead load tester. The electronic ones suck and have false readings on multiple occasions.
My wife has a 328 e92, put a oem battery in it and it went bad in 14 months.
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      01-17-2019, 08:31 PM   #7
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Sounds like the voltage regulator is going bad on the alternator, usually worn brushes on the regulator is the main cause and will cause the symptons you desribe
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      01-18-2019, 09:29 PM   #8
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Quote:
Originally Posted by amrazM View Post
Seems like an ibs error.
I checked the battery sensor, it seemed to be working. I replaced it anyway and problem still persists.
Quote:
Originally Posted by kawasaki00 View Post
Check the battery using the old faithful dead load tester. The electronic ones suck and have false readings on multiple occasions.
My wife has a 328 e92, put a oem battery in it and it went bad in 14 months.
I tried that as well. I'm getting what seems to be reasonable numbers.
Quote:
Originally Posted by 0_to_60 View Post
Sounds like the voltage regulator is going bad on the alternator, usually worn brushes on the regulator is the main cause and will cause the symptons you desribe
Interesting, I bought a new alternator, hopefully it works.
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