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  LiveWire / Technical Forums / Cars, Trucks & Vehicles / Viewing Topic

Alternator Problems
Replies: 15 — Last Post Oct. 7, 2008 8:46pm by KRNsoccerplayer24
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( medjai )



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Alright so the alternator is bad (its eaten two batteries already).

Why does the car die when I come to a stop light? Can I prevent it from dying by throwing it into neutral and maintaining a higher than idle rev? The car restarts after it dies no problem by the way.

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6:12 pm on Sep. 29, 2008 | Joined: Nov. 2003 | Days Active: 1,595
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Wealthy Hobo
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what kind of car is it

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6:13 pm on Sep. 29, 2008 | Joined: Sep. 2008 | Days Active: 171
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Killer Tofu


Wealthy Hobo 		Reply
get a new alternator..

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6:14 pm on Sep. 29, 2008 | Joined: Mar. 2008 | Days Active: 289
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2kewl4u2know


Swami
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My boyfriend's car used to do that too sometimes.  So, when it was really bad what he'd do is super slowly roll up to the stop, that way he could hopefully avoid stopping completely.  He eventually got new spark plugs or whatever and it's not as bad...although it's still a little shaky on speeds under 30.

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( medjai )



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It's a VW Jetta and it's my brother's car, so I'm not going to buy an alternator for it lol.

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6:17 pm on Sep. 29, 2008 | Joined: Nov. 2003 | Days Active: 1,595
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stl man


Wealthy Hobo 		Reply
Quote: from medjai at 9:17 pm on Sep. 29, 2008
It's a VW Jetta and it's my brother's car, so I'm not going to buy an alternator for it lol.
that's what u need to do. either that, or get a car battery charger

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6:19 pm on Sep. 29, 2008 | Joined: Sep. 2008 | Days Active: 146
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rijames99


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IF it's your alternator, you will be able to restart it only as long as the battery lasts, which won't be long.  You're using the juice in the battery to restart it while not recharging the battery.  get a new alternator.
Also, it may be stalling becausse of an ignititon problem, but if you know you're alternator is bad, start with that.
6:19 pm on Sep. 29, 2008 | Joined: Oct. 2006 | Days Active: 504
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( medjai )



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Ok but can the car still run if it's already running when the batteries completely dead, as in if I keep it revved for the entire trip (even at stops)?

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6:20 pm on Sep. 29, 2008 | Joined: Nov. 2003 | Days Active: 1,595
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ScoobyDoo82


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If the alternator is no good, no matter how much you rev you aren't going to produce a charge, just get a new one, thats the only way to solve your problem.

Also, shut everything off to conserve whats left of the battery (heat, a/c, radio, wipers, DRLs <(if possible)).

Post edited at 6:48 pm on Sep. 29, 2008 by ScoobyDoo82

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6:47 pm on Sep. 29, 2008 | Joined: Oct. 2007 | Days Active: 542
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( medjai )



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New question.

If I connect the battery in the jetta to the battery in my truck so as to jumpstart it, but instead of jumpstarting it, just let it sit there for a long period of time can I fully charge the battery?

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O` tru apothecary!
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7:02 pm on Sep. 29, 2008 | Joined: Nov. 2003 | Days Active: 1,595
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( medjai )



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Btw I don't have the option of throwing an alternator on or I would.

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O` tru apothecary!
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7:02 pm on Sep. 29, 2008 | Joined: Nov. 2003 | Days Active: 1,595
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ScoobyDoo82


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Im not totally sure but I would think it would change the battery, if you just let it idle. But make sure you dont kill the battery in the truck doing that.

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1993 Cavalier RS - 3.1L V6 - Automatic - 170k
7:22 pm on Sep. 29, 2008 | Joined: Oct. 2007 | Days Active: 542
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( medjai )



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Sounds good.

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O` tru apothecary!
Thy drugs are quick.
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9:14 pm on Sep. 29, 2008 | Joined: Nov. 2003 | Days Active: 1,595
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Neodymie


Omnipotent One
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No that wont work. Charges equalize. There will be no force to push it into the other battery so they just even out.

Are you positive it's the alternator? Try charging your battery completely then unhook the alternator. Try driving it around a little bit and wee what happens.

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AtomicCactus


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Quote: from medjai at 6:20 pm on Sep. 29, 2008
Ok but can the car still run if it's already running when the batteries completely dead...
That's the premise of leaving a car running while giving a boost...

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