1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

alternator

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Old May 7, 2004 | 01:48 PM
  #1  
YapaKanichi's Avatar
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From: Don't you wish you knew....
alternator

ok now I'm pretty sure that my alternator is dying but Iwant some more input. When I'm driving I'm only registering about 12.5 volts. When I stop to turn or stop sign, etc. it drops to 11 volts or below. Just give me some input on this.

edit: forgot to mention I'm last time I had it tested I was highest of 13.8 volts and 30 amps.
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Old May 7, 2004 | 03:20 PM
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From: Calgary, Canada
yup you're right

its dying


replace or repair it.

have you checked yoru wiring around the battery? i ahd a problem there wiht a short becausew those wires were aging
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Old May 7, 2004 | 05:31 PM
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First look into your grounds had the same problem put in a ground from engine to chassis and the problem was gone .
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Old May 7, 2004 | 05:41 PM
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I just went through a few bouts with the alt and battery. The main problem ended up being the ground wire on the battery. Get the battery and alt tested. If they both are good then you know to look at the wiring mainly the ground. The guys that helped me in my post were right on. It sounds like a simliar problem the voltage is dropping the more power is used.

[URL=https://www.rx7club.com/showthread.php?s=&threadid=302618]

If it doesn't work sell me your car really cheap..
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Old May 9, 2004 | 09:00 PM
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From: Don't you wish you knew....
ok I'll make sure to sell it lol just put tires on her
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Old May 9, 2004 | 10:58 PM
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also the stock guage is b.s. but yea extra grounds help... i saw 1 volt on my guage when i added extra grounds
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Old May 10, 2004 | 03:14 AM
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as did i after adding grounds i have about 3 now just tore them outa cars at boneyard a few bucks. also try to upgrade your alt or if you dont wanna do that you can get 5 more amps and install an gslse like i did got it for free but just a thought my guage only drops to 13 when fan is on and idling low like 5-6 hundred normal at 7-850 its at 14.5
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Old May 10, 2004 | 07:00 PM
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From: Don't you wish you knew....
well I've come to the conclusion, well I've known the alt is dead but I wanted to see some other helpful guidelines, I'll replace the grounds soon, but first I need a clutch......desperately lol.
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Old May 10, 2004 | 08:16 PM
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From: New York
try to find an s5 in the junker, rip the alt out of there, do a little modding of the wiring, get a new adaptor and slap that bitch on, made a world of difference in my 85 gsl

or just find an s4 and rip the one out of that, no modifying to be done, and around 10-15 amp gain, it's better to have more than not enough...
i've gone through like three of these in the last year
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