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Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

You could wait until it actually starts causing a misfire, or you could take out a screwdriver and GO CHECK YOUR VOLTAGE REGULATOR NOW!

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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

staticsan · Joined: 19 Jan 2009 Posts: 450 Location: Sydney, Australia

Ow.

Or you make the mistake I made. New battery with "calcium" plates. Didn't know this needed a higher voltage and probably higher current to charge. This also means driving at night the car isn't charging the battery.

Of course, the alternator light has been glowing for quite a while when I use the headlights...

Wade.
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'82 British NA - Which I think I've been very lucky with!

Ozzie · Posted: Tue Apr 09, 2013 11:59 am Post subject:

I found fitting a battery earth cable direct from the alternator frame to chassis worked wonders.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

morghen · Joined: 21 Jan 2005 Posts: 9102 Location: Romania

or replace the ground wire from the alternator...
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staticsan · Joined: 19 Jan 2009 Posts: 450 Location: Sydney, Australia

Hah. Auto-electrician didn't like me offering ideas from the 'net.

Not sure what was really wrong with my alternator. So they pulled it apart and cleaned it, put a new regulator in it and then they ran a new charging line right to the battery. So I guess a new ground cable was probably not so far off the mark!

Starts a lot better now. Accelerates slightly better, too.

Wade.
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'82 British NA - Which I think I've been very lucky with!