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Registered
Join Date: Dec 2009
Location: Wayne, PA
Posts: 2,010
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New VR. Still 14.9V at Idle. WTF??
I was putting out too much voltage to my battery, so I replaced the voltage regulator. Yet I am now still putting out 14.9 volts terminal to terminal at idle.
Do I need a new alternator? Am I missing some other check? I am clueless on this(amongst many other things).
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Christopher Mahalick 1984 911 Targa, 1974 Lotus Europa TCS 2001 BMW 530i(5spd!), Ducati 900 SS/SP 2006 Kawasaki Ninja 250, 2015 Yamaha R3 1965 Suzuki k15 Hillbilly, 1975 Suzuki GT750 |
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05-31-2016, 03:54 AM
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Do you have a chargeing light on? A bad diode in the alternator can cause over voltage.
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05-31-2016, 06:46 PM
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What happens to the voltage when you start driving the car (and increase engine revs)?
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1987 Venetian Blue (looks like grey) 930 Coupe 1990 Black 964 C2 Targa |
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05-31-2016, 07:22 PM
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Registered
Join Date: Dec 2009
Location: Wayne, PA
Posts: 2,010
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I will check at different rev ranges. I was by myself, so was unable to check the range.
No light on the dash. WIth a bad diode, could it still overcharge, even with a new voltage regulator?
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Christopher Mahalick 1984 911 Targa, 1974 Lotus Europa TCS 2001 BMW 530i(5spd!), Ducati 900 SS/SP 2006 Kawasaki Ninja 250, 2015 Yamaha R3 1965 Suzuki k15 Hillbilly, 1975 Suzuki GT750 |
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06-01-2016, 05:37 AM
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Yes. I had a glowing charging light with over voltage on my 73 Targa. Replaced voltage regulator, with no change. I then pulled alternator and found a bad diode. After diode replacement all functions returned to normal.
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06-01-2016, 01:29 PM
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1973 Porsche 911S
Ducati
1987 Porsche 930 3.3T
