Nissan 370Z Forum
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Nissan 370Z Forum (http://www.the370z.com/)
-   Engine & Drivetrain (http://www.the370z.com/engine-drivetrain/)
-   -   Help asap wont start (http://www.the370z.com/engine-drivetrain/134455-help-asap-wont-start.html)

geeteezee 08-01-2020 08:18 PM
Quote:
Originally Posted by Rusty (Post 3952010)
The avg life of a car battery is 3 to 5 yrs. You get anything over that, the stars are in alignment for that battery. The life span of a battery is dependent on a few things. Age. The number of times it has been deep cycled. That is draining the battery to almost zero volts, and bringing it back up. If the battery has run low on water, if the plates has been exposed.

The plates in a battery get a build-up of sulfate on them over time. If the sulfate breaks off the plates in a big enough piece. It will short out 2 plates next to each other. Causing a dead cell. Each cell is good for 2.2 volts. what causes the sulfate to break off. Age, it just fakes off. Running low on water and exposing the top of the plates. Air hits it and causes a reaction. Vibrations in the car.
The Doctor is in. Check your neuroses at the door. ;)

Rusty 08-01-2020 09:18 PM
The preferred battery.

https://www.autozone.com/batteries-s...11911_812681_0

CivilPenny 08-02-2020 12:50 PM
UPDATE 3...we charged the battery up to 12.5v yesterday, then unplugged the negative terminal and let it sit over night until now at 2pm. Read the battery and it was still at 12.3ish, hooked up the cable, and the car started. This in theory should eliminate the battery as the cause, because if it were the battery, it should have depleted greatly by itself over night. This means I have something drawing power while the car is off. I was praying it was just the battery, but now I have to take it in to have it diagnosed. Going to let it sit with terminals hooked up for a few hours and will read it one last time.


Weird, waited a few hours and tested it. Read 12.5 right where we left off...could the problem have solved itself..?

ban25 08-02-2020 05:13 PM
Quote:
Originally Posted by CivilPenny (Post 3952133)
UPDATE 3...we charged the battery up to 12.5v yesterday, then unplugged the negative terminal and let it sit over night until now at 2pm. Read the battery and it was still at 12.3ish, hooked up the cable, and the car started. This in theory should eliminate the battery as the cause, because if it were the battery, it should have depleted greatly by itself over night. This means I have something drawing power while the car is off. I was praying it was just the battery, but now I have to take it in to have it diagnosed. Going to let it sit with terminals hooked up for a few hours and will read it one last time.


Weird, waited a few hours and tested it. Read 12.5 right where we left off...could the problem have solved itself..?
How old is the battery? If its over 3 years, you should replace it. That will be cheaper than paying a shop to come up with the same diagnosis.

cv129 08-02-2020 07:46 PM
Quote:
Originally Posted by CivilPenny (Post 3952133)
...could the problem have solved itself..?
First time, you probably didn’t charge it enough.

Now, all you gotta do is drive it and remeasure voltage. If driving the car eats up your battery, then you take it in for diagnosis.

Ghostvette 08-04-2020 01:10 PM
Quote:
Originally Posted by CivilPenny (Post 3952133)
UPDATE 3...we charged the battery up to 12.5v yesterday, then unplugged the negative terminal and let it sit over night until now at 2pm. Read the battery and it was still at 12.3ish, hooked up the cable, and the car started. This in theory should eliminate the battery as the cause, because if it were the battery, it should have depleted greatly by itself over night. This means I have something drawing power while the car is off. I was praying it was just the battery, but now I have to take it in to have it diagnosed. Going to let it sit with terminals hooked up for a few hours and will read it one last time.


Weird, waited a few hours and tested it. Read 12.5 right where we left off...could the problem have solved itself..?
Batteries don't 'fix themselves'. Like Rusty said, if the battery is over 3 years old, you are on borrowed time. Get a new battery, preferably an AGM battery.

SouthArk370Z 08-04-2020 04:41 PM
The problem can be one (or more but probably just one) of three things:
1) Battery at the end of its life
2) Charging system not working properly
3) Parasitic load

It looks like you have eliminated 2 and 3.


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