Hey Guys, how is everyone? Well actually I have two questions. I am sure some of you in here will know the answers. I have an 89 GTA 5.7 TPI, and the first question is that the volt gauge is not accurate. It reads around 12 most of the time (On the Dash), when I put the meter on the car (At the Battery) it is really 13.8 volts with the AC on and the radio, and the dome lights on, Idling. I was wondering if there was a sensor, or sending unit etc, that I could change that would make this more accurate. Okay here is the last question. I just put a new Alternator on (Discount Auto) with a Lifetime warranty. When the car is Idling with the AC on, radio, dome lights, it is about 13.8 volts. If I rev her up she might go to 13.9. Now if I put the lights on Fog & headlights,AC,Dome and Radio, the voltage is 12.6,and when I rev her it wont go any higher?¿! So I can't imagine what would happen with the wipers on also, I would probably be discharging. Does this sound correct, or should I take this Alternator back? Thanks for all the help Guys!
RIDE ON!
C-Ya
Mike

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SmokinGTA-Pirate

 

The gauges are pretty inacurate, although the voltage gauge is the best one.

As far as voltage is concerned, 12-14 isn't that bad. You should be more worried about amps.

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else