What was your symptoms? High or low voltage?

 

Usually shows low but can be high, need to have it checked. You can check your self with multi meter. I would not keep running car as it can cause real damage.

 

I got the car home, and then it wouldn't start. Smelled very gassy. I read somewhere this could fry coil packs.

How can I rest the regulator? Doesn't the alternator need to be removed to even get to it?

 

Yes needs to be removed and yes over charging can cook a lot of things but surprised it didn't burn out line fuse, if our cars have one? There is diy here or rennlist for regulator replacement, not hard.

 

I've had regulators fail with both high/overcharging and low voltage scenarios, but mostly low voltage/low charging

 

Does it cause a limp mode? My car will not make any boost. .2 at Max

 

It could in theory if the over-voltage has fried one of many components...can you test your N75 valve?

 

No idea how to test that...

 

For me there was low voltage, only 12V on the dash gauge which raised the red flag, them then a light came on saying generator or something, then finally the battery light.
I wasn't far from home when this happened so I tried to make it back.
Car got down the 10.5 and all sorts of lights came on, psm abs, check engine, etcs

 

Better yet, do you have a Durametric? run a short test...
Test n75 by applying voltage and seeing if valve cycles

 

I sure don't. It's something I need to get someday. Staying stock I never saw the cost benefit

 

It's been a long while. I recall I removed the alternator and took it to an auto parts store and had it bench tested. It passed, but clearly wasn't working. I heard somewhere else that it would likely be the voltage regulator in this situation. I replaced it, crossed my fingers and installed it.

 

I was always under the impression the n75 was a vacuum controlled valve. Like a pcv. Never knew it was electric

 

3-way airflow valve(high pressure, vacuum, wastegate flow) controlled by electric cycling
allows air to be directed to wastegates to reduce/control boost, the vacuum line/relief allows pressure to be relieved from the wastegate pressure line to increase boost/cycle pressure out, high pressure side is the feed/signal.

 

^ correct.