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Charging Question

Old Apr 26, 2009 | 07:17 PM
  #1  
Night Stalker's Avatar
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Joined: Mar 2009
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From: Albany, NY
Car: 1987 IROC
Engine: 350
Transmission: 700R4
Axle/Gears: 10-Bolt 3.73
Charging Question

Yesterday on my way home i noticed my volt gauge was reading under 13 volts. When I got home I put a multi-meter on the battery and it read 11.92 volts with the engine running. Today I went back out to investigate the problem and got 12.41 volts with the engine off. Then I started the engine and tested it again and it still read 12.41 but then all of a sudden it jumped up to 14.39 volts. So, I'm thinking it must have a bad internal voltage regulator?? What do you guys think? Thanks
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Old Apr 27, 2009 | 01:25 AM
  #2  
macertheracer's Avatar
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Joined: Jan 2008
Posts: 194
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From: close to Wichita Kansas
Car: '91 RS CP now is the son's driver
Engine: CP =3.1, will get V-8 maybe someday
Transmission: stock
Axle/Gears: 3.42 posi W/ disks
Re: Charging Question

yes or a bad connection......... Ground, Alternator plugs, alt' power connection...?
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Old Apr 29, 2009 | 09:12 AM
  #3  
kcallais's Avatar
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Joined: Mar 2005
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From: Tyndall AFB, FL
Car: 1985 Z28
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: garbage 2.73
Re: Charging Question

14.39 sounds right for a properly charging alternator. Try taking a reading while keeping the motor at 2000rpms. If youre still getting 14+ vdc, try bumping the the throttle to give the regulator built into the alternator something to regulate. The faster the alternator spins.....meh, not getting into the theory of a PMG.
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Old Apr 29, 2009 | 10:08 AM
  #4  
Night Stalker's Avatar
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Junior Member
 
Joined: Mar 2009
Posts: 29
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From: Albany, NY
Car: 1987 IROC
Engine: 350
Transmission: 700R4
Axle/Gears: 10-Bolt 3.73
Re: Charging Question

Originally Posted by kcallais
14.39 sounds right for a properly charging alternator. Try taking a reading while keeping the motor at 2000rpms. If youre still getting 14+ vdc, try bumping the the throttle to give the regulator built into the alternator something to regulate. The faster the alternator spins.....meh, not getting into the theory of a PMG.
Thanks, But I already had the old one tested and it was a bad voltage reg. I replaced the alternator with a new one and everythings been fine so far. Thanks

Last edited by Night Stalker; Apr 29, 2009 at 10:29 AM.
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