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Bham, Alabama
Join Date: Mar 2008
Location: Alabama
Posts: 37
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Voltage Regulator madness
79 911sc, 85k on the clock. My tach needle has recently decided to go crazy bouncing all over from time to time and when it does I can hear the normal fuel pump buzz double in intensity , but it comes and goes.. to be safe I stopped driving it for the moment. I searched here for a bit then checked when it is happens and it reads 17v to the battery then drops back to 13-14v . I will go ahead and throw a new regulator in there as it is only $37 from Wayne but -
Does it seem logical that a voltage regulator could work hit or miss like this ? If this part doesnt fix it Ill yank the alternator and have it bench tested but a $37 fix sure would be nice. Thanks Gang.
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1984 500sl convertible euro w/lsd, abs 1993 525i 1972 Jensen Healey 1979 911sc 1990 Range Rover RIP Last edited by Tallbrad; 05-25-2010 at 06:11 PM.. |
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05-25-2010, 06:08 PM
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Registered
Join Date: Sep 2002
Location: Central Virginia
Posts: 414
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Happened to me with my 82 but it had internal reg. I replaced alt and reg and was perfect afterwards.
Before the fix lights would go bright then dim, tach would bounce crazy once in a while, and at one point I thought battery would explode (bulging). If you have external reg start there. Paul
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Paul '87 Carrera cab; '19 Ford Flex for the Dane and Lab; '17 Tacoma for truck stuff. '96 993 cab (gone, oops); '82 SC (gone) |
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05-25-2010, 06:14 PM
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Registered
Join Date: Nov 2008
Location: Baltimore, MD
Posts: 147
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I was driving my '88 one day and noticed that something smelled "hot". Got home and the battery was so hot I could not keep my hand on it for more then a second or so. Voltage at batt with car running was over 17 volts!
A bad voltage reg is a dangerous issue. Electrical items can be damaged and batteries have been known to explode. I will be putting a gauge or meter to monitor alternator output in my car.
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1970 914-6 1988 911 1985 928S 1974 Triumph TR6 1974 Datsun 260Z |
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05-25-2010, 09:56 PM
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