Thread: Voltage drop at stops!
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Old 03-30-2019, 03:05 AM   #20 (permalink)
Z34Life
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Join Date: Jun 2014
Location: Sydney Australia
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Drives: 12 Nissan 370Z M6
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Originally Posted by Z34Life View Post
i have the same problem at the moment as well. If I start the car, it idles at 14V. I can leave the car idling for 15 20 minutes and the voltage wont change. However if or when i start driving the voltage will fall to 12.6V as well and i could drive over a bump or something and the voltage will move around.

Possibility:

Im investigating the thought that it could be a slipping Serpentine belt due to a loose tensioner. il come back to you on this.
Looks like it was a battery issue for me. One of the cells was playing up and thus the intermittent nature of it. my cranking output was also half now due to this issue. Luckily it was under the battery manufacturer warranty.
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