Originally Posted by sawgunner
my car is weird, the voltometer usually rides between 14.7 and 15.1 stock but occasionaly it will plumit while driving or sitting at a light down to the lowest of 11.2 and then come back to 14.7 but it usually happens at night and dims the lights to the point where i really cant see any thing any tips or suggestions greatly appreciated
mine does the exact same thing. my 93 did it as well. and my dads 05 grand prix did it too. i read a tsb written for the grand prix that explained the whole problem and how the alternator cant put out that much voltage while alot of accessories are on at idle. that why if u bring the rpms up the voltage goes up to normal as well.