15.6V@WOT normal?
09-24-2012, 01:36 PM
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15.6V@WOT normal? Just curious, since this seems excessive. During cruise I have noticed 14.8-15.8V without headlights, A/C, or anything else on, other then whats required.
I am also wondering if this voltage is taxing my HP. If so; is there a way to make changes by using HP tuners?
I am also wondering if this voltage is taxing my HP. If so; is there a way to make changes by using HP tuners?
09-24-2012, 02:36 PM
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It's abnormal, but there's always the question of "which
ground?" - PCM ground might or might not be the same
voltage as block ground (should be; assume nothing),
which is what the alternator refers its output to for
regulation. That wants checking.
ground?" - PCM ground might or might not be the same
voltage as block ground (should be; assume nothing),
which is what the alternator refers its output to for
regulation. That wants checking.
09-24-2012, 06:14 PM
#3
13.9 to 14.2v is normal no load voltage.
The first thing to check is the battery,a bad one can cause
a high charging voltage and testing the alternator on the car
is not a valid test w\o a known good battery. One thing for
sure is the battery won't live long at 15+ volts.
The first thing to check is the battery,a bad one can cause
a high charging voltage and testing the alternator on the car
is not a valid test w\o a known good battery. One thing for
sure is the battery won't live long at 15+ volts.
09-24-2012, 07:40 PM
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Guess I will be checking for lose/bad grounds.
The good: Might have found a few more HP
09-25-2012, 11:36 AM
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Bad battery current sensor (BCS). I am now@13.6V when cruising and 13.2@ idle.
Drops to 13.5V@WOT.
This was recorded with no additional load.
Drops to 13.5V@WOT.
This was recorded with no additional load.