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Old 07-13-2002, 11:18 AM   #1 (permalink)
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car battery voltage ?.

Usually it will fluctuate between 12 v and 14.4 v.
Yesterday mine was bouncing as high as 15.5v.
is that bad? Could that damage something?

I'd never seen it that high.
Yesterday I hooked up my oil press/temp sensors and replaced my gauge cluster with one I got at a junkyard (my water temp gauge broke).


and I changed my oil and bathed my garage spiders in used 10w30
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Old 07-13-2002, 11:48 AM   #2 (permalink)
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hmmm i dont think so...r your gauges all running off of 1 power source? that usually creates bad interference
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Old 07-13-2002, 12:07 PM   #3 (permalink)
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this is coming from my RSM which is wired directly into the ECU, even for power. (that is per Apexi's directions).
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Old 07-13-2002, 10:59 PM   #4 (permalink)
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tTT
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Old 07-14-2002, 07:09 PM   #5 (permalink)
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ttt
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Old 07-14-2002, 08:29 PM   #6 (permalink)
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14.4V is normal, anything below 13.5V is marginal in that you're battery won't get recharged on short trips. 15.5V is very high though, the only thing it will damage is your battery (it will prematurely wear out.) Double check the readings with a multimeter across the battery terminals. I suspect the your guage is not getting a good reading from the ECU power wire. If you confirm those readings than have the voltage regulator checked, it may be bad.
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