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i keep killling alternators WHY??

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Old Jun 15, 2006 | 06:05 PM
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Default i keep killling alternators WHY??

Ok Im On My 4th Alternator

actually its the same one that is getting rebuilt by a very reputable builder..

but the story goes ... i put it in and it works great... after driving arround for a little bit and the car gets nice and hot the voltage starts surging from 12v-14v even while im up in rpms (2-3k).... not too long after that (a few hrs worth of driveing) the thing just stops working completly


the last 2 times the voltage regulator was replaced but this does not seem to fix the entire problem.. my hypothesis is sometihng is causing the volage regulator to burn up


also i have replaced all the grounds and have a 4ga wire ran to my battery in the rear of the car...

The only thing i can guess might be causing this is along time ago i removed the heat sheild between the engine and alternator but for everyone i spoke with they said this was no big deal and definately not my cause


finally the car always throws the code po1637 L-generator (old) (immature)

-HELP!!!

Last edited by Jpr5690; Jun 15, 2006 at 06:12 PM.
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Old Jun 15, 2006 | 06:14 PM
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Again When The Car Is Cold The Thing Works Fine .. It Is Not Until The Car Has Been Driven For A Few Miles That The Surgung Anf Failing Of The Alternator Happens?

Also This Is A 200amp Alternator I Also Have A Underdrive Pulley And A Yellowtop
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Old Jun 15, 2006 | 07:07 PM
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SO... do you have an aftermarket stereo setup? amps and all? maybe you need a higher amp alternator. i went through 4 alternators in a week in my 91. i think the rebuilt ones were just junk. they only worked for about a day before i was left stranded on the side of the road. after the fourth one, i never had any problems. so i'd say check your amp connections, if nothing is criss crossed, and everything is straight, i'd try a higher output alternator.
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Old Jun 15, 2006 | 07:44 PM
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Yeah if I was you i'd get a good alternator with high output.
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Old Jun 15, 2006 | 09:58 PM
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DAM GUYS READ THE POST PLEASE

Originally Posted by Jpr5690
Again When The Car Is Cold The Thing Works Fine .. It Is Not Until The Car Has Been Driven For A Few Miles That The Surgung Anf Failing Of The Alternator Happens?

Also This Is A 200amp Alternator I Also Have A Underdrive Pulley And A Yellowtop
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Old Jun 15, 2006 | 09:59 PM
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also amps are wired fine
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Old Jun 15, 2006 | 10:42 PM
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From your description, it sounds like a heat problem. Something is trying to short to ground when it gets too hot. My first guess is your battery is causing the problem.
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Old Jun 16, 2006 | 12:02 AM
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???

could a damaged battery be causing this?
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Old Jun 16, 2006 | 12:03 AM
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BTW i was thinking heat too.. just not from the way you put it


also my battery is in my spare tire will so it dont get hot.. but lets say my battery was damaged somehow could this cause the unit to click on and off?
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Old Jun 16, 2006 | 12:19 AM
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?????? My Battery Did Sustain Damage A While Back (arck'ed It Pretty Bad) But I Didnt Think Anything Was Wrong With It ? I Know The Battery Is Not Getting Hot But Could The Battery Be Shorting Somehow And That Cause The Alternator To Ground Out?
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Old Jun 16, 2006 | 12:20 AM
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do you have an overdrive alt. pulley? maybe the alt isnt charging enough and just wearing its self out over time
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Old Jun 16, 2006 | 01:38 AM
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Ok Its Not The Battery (swapped Batteries) I Had A Overdrive Pulley But We Guessed The Last One (2nd One) Blew Up Due To Over Reving It So We Replaced It With A Bigger Pulley To Slow It Down A Bit At High Rpms
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Old Jun 16, 2006 | 10:54 AM
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Anyone Else???
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Old Jun 16, 2006 | 01:28 PM
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It is your one wire plug on top of the alternator. Because of the lack of tension on it, it's starting to give way. That's why your throwing the P01637 code. Believe me, I went trough the same thing. I kept replaceing the alternator, replacing batteries, then one day the wire just snapped. Went to the dealer and picked one up for like $35. They'll give you the plug with 4 wires, but just cut the 3 you don't need. Trust me, replace that plug and all your troubles will go away.
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Old Jun 16, 2006 | 02:17 PM
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lack of tension? also i've hooked a mulitmeter up to that wire and it seems to be sending a signal ..... along time ago i extended that wire after it snapped off .. the connections are all soidered and heatshrinked......is their a way i can test the wire besides just hooking a mulit meter up to it while the cars idleing


all i was able to do was stick the probe from the mulitmeter inside the tip of the plug and it read something like 9-10v but i dont really know what the told me except for that the wire is not shorted
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Old Jun 16, 2006 | 02:42 PM
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Well that's what I did. If your still getting the code, that's what it is. Just replace it and see if the code goes away.
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Old Jun 16, 2006 | 03:31 PM
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Originally Posted by Jpr5690
Again When The Car Is Cold The Thing Works Fine .. It Is Not Until The Car Has Been Driven For A Few Miles That The Surgung Anf Failing Of The Alternator Happens?

Also This Is A 200amp Alternator I Also Have A Underdrive Pulley And A Yellowtop
If I have said it once, I have said it a thousand times.....

Have your battery checked. If you are running the yellow top, this battery requires alot, I mean ALOT to recharge it. To the point it will suck everything the alternator has to give and still want more. I have seen this on more than one occasion and have talked to reputible builders of alternators in the stereo competition world. I am not going to go into it on your post, do a search and it should come up under my name.

Also as stated above, check the small wire on the back of the alternator. Mine broke off while doing motor mounts. I paid like $8 to get another from a sponsor.
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Old Jun 16, 2006 | 04:47 PM
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thanks for the intrest guys but really i just got done saying i had used a mulitmeter to verify that their is a live wire plugging into the aternator although i cant be sure the wire is sending a "proper" signal i am sure their is some current running down that wire up to the tip of the plug that goen into the alternator also the alternator does work at times its just inconsistent as i gets hot..

also not to agrue but yellowtops actually take less effort to recharge.. this is one of their many strong points.. and if you look on the website one of their main seling points. see the higher the resistance the harder the alternator has to work to charge the battery but being yellowtops are known for their low resistance they allow for less strain on your chargng system...

finally ALSO SAID ABOVE i swapped batteries for a brand new battery out of my other car last night this was a top end but regular type battery and the alternator did the exact same thing....

i hate to sound like an ***....because i know your only tring to help; AND I REALLY DO APPRICIATE THE HELP... but really your not helping id you dont read the posts before just misguiding me with diagnosis that are already excluded in my problems decription

personally i try to read the thread before respnding to a post
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Old Jun 16, 2006 | 04:53 PM
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i was thinking just for the fun of this whole thing im gonna replace that plug latter this weekend and see if somehow im missing something .. i really doubt its the prob but ill be glad to say im the *** if it is ...

ill keep you all posted
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Old Jun 20, 2006 | 08:09 AM
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Originally Posted by Jpr5690
thanks for the intrest guys but really i just got done saying i had used a mulitmeter to verify that their is a live wire plugging into the aternator although i cant be sure the wire is sending a "proper" signal i am sure their is some current running down that wire up to the tip of the plug that goen into the alternator also the alternator does work at times its just inconsistent as i gets hot..

also not to agrue but yellowtops actually take less effort to recharge.. this is one of their many strong points.. and if you look on the website one of their main seling points. see the higher the resistance the harder the alternator has to work to charge the battery but being yellowtops are known for their low resistance they allow for less strain on your chargng system...

finally ALSO SAID ABOVE i swapped batteries for a brand new battery out of my other car last night this was a top end but regular type battery and the alternator did the exact same thing....

i hate to sound like an ***....because i know your only tring to help; AND I REALLY DO APPRICIATE THE HELP... but really your not helping id you dont read the posts before just misguiding me with diagnosis that are already excluded in my problems decription

personally i try to read the thread before respnding to a post

affirmative on the yellow tops, it doesn't required allot of power to recharge.

Is the alternator high powered or factory speced?

Someone mentioned to check the tension. This will kill the alternator too.

If the alternator belt slips, it causes heat buildup on the front shaft and the bearing will fail prematurely. It will fail, especially if your using a high powered alternator.
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