Does anyone know (slightly OT)
 

...if the voltage regulator for an '88 944 is the same as for a '90 Corrado G60? GF's Corrado is exhibiting poor charging performance and would like to rule out regulator before removing the alternator for testing. I *suspect* a bad diode in the alternator, but would like to try the easy stuff first. FLAPS does not stock the regulator and wants an exorbitant price for it anyway.

Also, if it does turn out to be the regulator, anyone know where to get a Transpo unit? Wanted to get her one anyway to keep the battery fully charged; I don't like the way the German ones seem to run at 13.7V or less.

thanks

nate

bump... anyone? little help please...

nate

(about to set BOTH cars on fire and push them off a farking cliff... might as well make it a trifecta and include the '55 coupe which apparently doesn't like oil, the way it rejects it from every single seal and gasket...)

Bosch 30 091, fits 944 and virtually every Audi/VW ever made.

you dont have to remove the alternator for testing, just get the car running and measure amperage/voltage across the battery. When the car is running, you are actually reading the numbers from the alternator, rather than the battery

thanks guys, yes I do need to remove the alternator if the regulator doesn't fix it, it's putting out about 13.7V running but that drops to about 13.4 with accessories on and the battery has gone dead a couple times recently leading me to believe that there's some key off current draw so I think it's time to test some diodes...

nate

My experience has been that diodes are all on nothing. If one dies, the voltage drops dramatically and not a measly .3V.

The voltage drop under load sounds more like something soaking up power that it shouldn't which makes the voltage drop a bit and if the voltage at the battery drops too much it won't be able to charge the battery.

I would try pulling accessory fuses to see if there is a particular circuit that is causing the voltage drop.

Of course, I could easily be wrong.