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Problem after installing new battery...

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Old 07-27-2009, 04:39 PM
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coletrain12
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Default Problem after installing new battery...

Hey guys, have a 2003 350z touring. The dealership told me the battery was near failure and the starts sounded a little weak, so I went and purchased a new battery.

After installing the new battery, when starting the car after it starts fine the idle goes down almost all the way to 0 like it is going to die but then comes back up to normal idle.. but sometimes it does die. Any idea as to what caused this?

Thanks,
Cole
Old 07-27-2009, 05:29 PM
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davidv
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Not unusual after disconnecting battery.

I got a new battery several months ago. RPM would drop to zero stalling the car. Instead of doing the ECU reset thing, I left it alone. Car was fine after a few days.
Old 07-27-2009, 09:02 PM
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ZKansasZ
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https://my350z.com/forum/maintenance...a-battery.html
Old 07-28-2009, 06:31 PM
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coletrain12
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Ok guys, im just going to leave it alone and see what happens. Now it only does it sometimes... this morning it started fine but when i left work it tried to die again.

Just going to give it more time i guess.
Old 08-04-2009, 05:06 PM
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coletrain12
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Ok guys, UPDATE!

It seems the car has gotten better about the stalling/low RPM. It never does it like in the morning when i leave for work or when I leave work in the afternoon. It seems it does not do it after it has been sitting for a while.

However, if I turn the car on, then shut it off and try to restart it in a small amount of time it will still go low RPM and even stall sometimes.

Should I just keep driving it? Or could it be some other problem? I mean its been a while since I changed the battery, i figured it would be worked out by now.
Old 08-18-2009, 03:47 AM
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davidv
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Originally Posted by coletrain12
Ok guys, UPDATE!

It seems the car has gotten better about the stalling/low RPM. It never does it like in the morning when i leave for work or when I leave work in the afternoon. It seems it does not do it after it has been sitting for a while.

However, if I turn the car on, then shut it off and try to restart it in a small amount of time it will still go low RPM and even stall sometimes.

Should I just keep driving it? Or could it be some other problem? I mean its been a while since I changed the battery, i figured it would be worked out by now.
The battery does not determine idle speed. The ECU does. Do the manual reset thing.
Old 08-29-2009, 04:45 PM
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Did you try the manual reset? How did that work?
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