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Charging System Voltage question

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Old Sep 5, 2024 | 07:18 PM
  #1  
OneCoolGT's Avatar
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Joined: January 28, 2005
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From: Douglassville, PA
Charging System Voltage question

I have a question, about a month ago my alternator went and bought another PA Performance 130 amp one along with the upgraded power wire. When I start the car cold the volts are at 14, 13.5 while cruising on the highway and drops to 13 and 12.9 with the lights on at idle.. I didn't notice it ever dropping below 13.5 with the old alternator, I called American Muscle and they verified this is normal.. I just had the battery replaced and hoping it's charging properly. Has anyone else experienced this? Thanks in advance for any help.



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Last edited by OneCoolGT; Sep 5, 2024 at 07:20 PM.
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Old Sep 6, 2024 | 04:52 AM
  #2  
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Joined: February 13, 2006
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Originally Posted by OneCoolGT
I have a question, about a month ago my alternator went and bought another PA Performance 130 amp one along with the upgraded power wire. When I start the car cold the volts are at 14, 13.5 while cruising on the highway and drops to 13 and 12.9 with the lights on at idle.. I didn't notice it ever dropping below 13.5 with the old alternator, I called American Muscle and they verified this is normal.. I just had the battery replaced and hoping it's charging properly. Has anyone else experienced this? Thanks in advance for any help.
12.9 V sounds lower than I remember, but overall the voltage dropping as the car warms up is normal. Check out this thread:

https://themustangsource.com/forums/...9/#post6954798
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