Hi all , need some experienced opinion , something weird going on in my 996 tt 03 , the car was in the garage on the lift I did some tranny work for month , negative was disconnected from the battery , I put the car together , it starts fine I drove the car week or so , today I looked at the dash , the pointer was on 12V while the car was running , I put meter on battery terminals , 11.4V I opened the trunk same reading on the terminal by the oil filter , does that mean generator not charging the battery ? I'm not getting any lights on the dash . now the battery 10.4 V , which is probably the end for it , another thing I don't understand is when I'm starting the car up I see around 13.5 V on the dash for minute or so and then it drops to 12 V (now lower) any advices ? Thanks
ps 6 month on 911tuning soft , happy ! car running like a champ , when it's charging the battery lol

 

I would guess alternator you could probably change regulator if your mechanically inclined. The best bet would be to have it load checked and battery tested at a good shop. Do you keep battery tender connected?

 

It's normal that I didn't get dash red battery warning light ? Not keeping the battery in charge but I'm driving the car all the time , if not I'm disconnecting the terminal .what regulator ? I looked at that , filter box out , Y pipe out , might filter housing , but I don't know what's this .

 

found the regulator , not a big deal , yes I can replace it I just want make sure thats the issue .

 

Your best bet is to have shop check system as I noted above. I have seen in another post about checking ground on engine, I believe its on left side. I'm sure you will get some other good advice.

 

thank you , was planning on checking the grounds tomorrow , the regulator is only $37 .

 

Yes its easy to do and more then likely the issue good luck.

 

thank you sir !

 

more ideas guys ?

 

^ reads like a failing alt to me also.

 

thank you guys , problem fixed , alt replaced really easy job , $160 1 hour labor

 

Well done where did you find it for that price?

 

isn't it great when stuff works again congrats on the ez fix.

 

Advanced auto parts , 0.4 miles away from my house same Bosch part # as original alt , I was surprised at this point but it is what it is .

 

Yeah it's a great filling thanks