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augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

If I sit at idle it lowers to ten volts. It’s fairly consistent with the rise in engine temperature and the volts drop. Its not fan actuated.
I can run at 60 mph all day and it will never drop.
If I sit in traffic after a minute its drops. Belt is good and tight.
Before I replace the voltage regulator any other ideas?
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

Paul · Posted: Tue Dec 14, 2004 12:21 pm Post subject:

Are you trusting the in car voltmeter or have you hooked a good volt ohm meter directly up to the battery?
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

No voltmeter yet. Got a little lazy after the weekend repair romp.
My starter does not turn over as well so I thought a definite charging issue. In fact it's real sluggish after the volt drop I described.
I charged the battery all Sunday night and it ran well this morn.
On the way home, volt drop again.
I don't know how to test the regulator. Do I put it in series with the battery pos?
It all seemed to happen after the heater coil leak.
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

Paul · Posted: Tue Dec 14, 2004 1:20 pm Post subject:

The quickest way to find out what's going on is to yank the alternator and take it to a parts house for a free test.

Based on your description, it may be the regulator, which means you must pull the alternator anyhow, why not get it tested before spending money?
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

Joes924Racer · Posted: Wed Dec 15, 2004 5:47 am Post subject:

Hey Augi, paul dang donkeys luck my chargin sys. is on the
lamb also. See I pulled everything to clean it up repair any wires
when I installed exhaust now volt guage reads 12.7 whilst its running and the chrging sys. isnt working. Les Swabs told me so.

Dont know if maybe I put a wire on wrong between the starter and alt.
comin off the 3 prong connector. Ill pull and test the alt though, I have a few alts that are good.
Though at this point Im not sure whats correct for hooking up the wires
bewteen the alt and starter. Any help here would be appreciated and a reward of kind words and such offered.

_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

Napa is giving me a replacement regulator because it was less than a year on the new one.
Here you go Joe, Hope this helps

http://www.924board.org/viewtopic.php?t=9591&start=0&postdays=0&postorder=asc&highlight=starter
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

Joes924Racer · Posted: Wed Dec 15, 2004 2:27 pm Post subject:

Thanks I feel like a thread jacker.
I fixed my charging prob.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Thu Dec 23, 2004 6:23 pm Post subject:

Does this diagram look right got the volt guage, power switch,push button start, alternator, starter, & battery.

_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.