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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > F30 Scary Noise Not Starting!
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      01-19-2021, 11:07 PM   #23
chiefneil
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Quote:
Originally Posted by Lex G View Post
Tried attaching trickle charger to jump ports under the hood and wasnt getting anything. Used the force mode on the NOCO GENIUS 5 to raise volts on battery and still didnt work.
Have you tried AGM mode on your NOCO?
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      01-20-2021, 12:44 AM   #24
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Quote:
Originally Posted by Lex G View Post
Tried attaching trickle charger to jump ports under the hood and wasnt getting anything. Used the force mode on the NOCO GENIUS 5 to raise volts on battery and still didnt work.
Have you tried AGM mode on your NOCO?
Yes sir wouldnt work even with force mode.
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      01-20-2021, 05:32 AM   #25
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Brand new battery from bmw and registered like a month ago, no codes present, car simply dies once i lock it.
What do you mean the car dies when you lock it? Do you mean you have a parasitic drain that kills the battery when your car is off?
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      01-20-2021, 06:03 AM   #26
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This sounds like something is draining your batterie.
Can you hear any noises after the car was shut and gone to sleep. Something which is still activated?
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      01-20-2021, 07:25 AM   #27
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13 volts is normal for a battery, hes getting 3 volts when he goes to crank, that is one of two things, a bad battery or a bad connection. seeming he just had a battery replaced I'm going with check your connections. keep it simple for the first tests guys.

It seems all of you are ignoring the work that was just performed, and that the battery is at 13 volts before starting, 3 volts while cranking and 13 volts after it fails the start. battery connection is the most common point of failure when a new battery gets put in.

maybe while we're at it we should tell him he needs a new engine first
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      01-20-2021, 07:35 AM   #28
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Originally Posted by Lex G View Post
The previous battery completely died after coming back from a trip to Vegas. Not sure if the colder weather had something to do with it doubt it. Bought a brand new battery from BMW then a couple weeks after it died again.
That tells me something is AFU in your electrical system. Whatever it is it drained your original battery and then it drained your new battery.
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      01-20-2021, 10:54 AM   #29
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Originally Posted by TheFanatic View Post
13 volts is normal for a battery, hes getting 3 volts when he goes to crank, that is one of two things, a bad battery or a bad connection. seeming he just had a battery replaced I'm going with check your connections. keep it simple for the first tests guys.

It seems all of you are ignoring the work that was just performed, and that the battery is at 13 volts before starting, 3 volts while cranking and 13 volts after it fails the start. battery connection is the most common point of failure when a new battery gets put in.

maybe while we're at it we should tell him he needs a new engine first
After it fails to start the battery simply stays at 3V.
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      01-20-2021, 10:56 AM   #30
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After it fails to start the battery simply stays at 3V.
and you have to charge it to get it back up to 13v?
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      01-20-2021, 11:37 AM   #31
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Quote:
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Quote:
Originally Posted by Lex G View Post
After it fails to start the battery simply stays at 3V.
and you have to charge it to get it back up to 13v?
First time I attempted to start the car i used a jump starter from under the hood and got the 13v. Once it failed to start it made all the weird noises and dropped completely to 3V. Gonna see if its the same case when i leave the trickle charger, gonna leave it attached so its fully charged. Ill get back with yall.
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      01-29-2021, 06:21 PM   #32
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Update!!

After taking the car to the dealer they diagnosed that under voltage faults were present and caused by the auxiliary battery. They replaced and registered new battery as well as cleared codes.
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      01-30-2021, 01:10 PM   #33
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I just hope for you this fixed it
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